Introduzione
in Italiano
Veloce, potente e flessibile più che mai!
EViews
è il software leader di mercato per la stima e la simulazione
di modelli econometrici.
Dal
1994, grazie all'interfaccia object-oriented, EViews offre
una vasta scelta di analisi statistiche e visualizzazioni
grafiche senza bisogno di memorizzare complicati comandi,
linguaggi particolari o scorrere infiniti menu di comandi.
Molte procedure statistiche sono semplici alternative tra
oggetti di EViews: un semplice menu consente di scegliere
tra differenti visualizzazioni degli stessi dati, che possono
essere mostrati come foglio elettronico, grafici.
Dalla versione 7 EViews può avvalersi dei sistemi
multi-processore; ha potenziato le capacità di gestire
workfile con frequenze di ogni tipo: high-frequency (Intraday)
data, dati con frequenze di ore, minuti, secondi, ecc. Sono
state inoltre arricchite le capacità di auto-aggiornamento
dei grafici e le possibilità di programmazione del
sistema. Infine è stata incrementata la libreria
di funzioni computazionali per l’econometria e la statistica.
Versioni
disponibili
EViews viene fornito nella versione Standard o nella versione
versione Enterprise che aggiunge alle caratteristiche della
versione standard l'accesso diretto a database ODBC e la connessione
trasparente ai più importanti database di dati economici forniti
da terze parti: Global Insight's databanks2, Haver Analytics
DLX3, Datastream, FactSet, Moody's Economy.com e il formato
FAME4.
EViews 7 for Windows
EViews 7 offers academic researchers,
corporations, government agencies, and students
access to powerful statistical, forecasting, and
modeling tools through an innovative, easy-to-use
object-oriented interface.
EViews blends the best of modern software technology with cutting
edge features. The result is a state-of-the art program that offers
unprecedented power within a flexible, easy-to-use interface.
Explore the world of EViews and discover why it's the worldwide
leader in Windows-based econometric software and the choice of those
who demand the very best.
A
combination of power and ease-of-use make EViews 7 the ideal package
for anyone working with time series, cross-section, or longitudinal
data. With EViews, you can quickly and efficiently manage your data,
perform econometric and statistical analysis, generate forecasts or
model simulations, and produce high quality graphs and tables for
publication or inclusion in other applications.
Featuring an innovative graphical object-oriented user-interface and
a sophisticated analysis engine, EViews blends the best of modern
software technology with the features you’ve always wanted. The result
is a state-of-the art program that offers unprecedented power within a
flexible, easy-to-use interface.
Find out for yourself why EViews is the worldwide leader in
Windows-based econometric software and the choice of those who demand
the very best.
Part 1: An Intuitive, Easy-to-Use Interface
QMS sets the standard for
what statistical software can be by incorporating modern windowing and object-based
techniques in econometric software. The result is a program that provides unprecedented
power, wrapped in an intuitive, easy-to-use user interface. |
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An Object-Based Interface
At the heart of the innovative
EViews interface is the concept of an object. Series, equations, and systems are just a
few examples of objects. Each object has its own window, menus, procedures, and its own
views of its data. Most statistical procedures are simply alternate views of the object.
For example, a simple menu choice from a series window changes the display between a
spreadsheet, various graph views, descriptive statistics and tests, tabulations,
correlograms, unit root, and independence tests.
Similarly, an equation window allows you to
switch between a display of the equation specification, basic estimation results,
actual-fitted-residual graphs and tables, a display of the equation ARMA structure (if
appropriate), gradients and derivatives of the specification, the coefficient covariance
matrix, forecast graphs and evaluations, and over a dozen diagnostic and hypothesis tests. |
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| You can select a
histogram view from the series-specific menu. |
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Multiple Window Display
Unlike traditional statistics
programs that support viewing only one estimation equation or graph at a time, EViews
allows for simultaneous display of multiple objects, each in its own window. This true
multiple window support makes it easy to perform side-by-side comparisons of series plots,
hypothesis tests, equation estimates, or model forecasts developed under alternative
assumptions. |
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| EViews offers true
multi-window support. |
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Dynamic Object Updating
EViews incorporates the best of modern spreadsheet and relational database technology into tools for performing
the traditional tasks of statistical software. The EViews object-based approach includes sophisticated
linking technology that allows you to define relationships between multiple objects and
external data sources. Series objects, for example, may be linked by formula to data
in other series, to match merged or frequency converted data from alternate data sets, or
to data from external databases. When defined in this fashion, the linked series
dynamically updates its data whenever the underlying data change.
Similarly, an EViews model simulation object can be linked to equation or system objects so that the model
specification updates automatically when the underlying equation or system is re-specified
or re-estimated. |
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| Modern linking
technology offers dynamic updating of data. |
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Windows Integration
Couple all of this with strong Windows integration,
including drag-and-drop file import for over twenty popular file formats and
copy-and-paste export of presentation quality graphs and tables, and you have a modern
interface that allows you to accomplish, with ease, tasks that are difficult or impossible
using traditional statistical software. |
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| Easy data import
using drag-and-drop. |
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Part 2: Powerful Analytical Tools
In
contrast with most other econometric software, there is no reason for
most users to learn a complicated command language. EViews' built-in
procedures are a mouse-click away and provide the tools most frequently
used in practical econometric and forecasting work. |
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Basic Statistical Analysis
EViews supports a wide range
of basic statistical analyses, encompassing everything from simple descriptive statistics
to parametric and nonparametric hypothesis tests.
Basic descriptive statistics are quickly and easily
computed over an entire sample, by a categorization based on one or more variables, or by
cross-section or period in panel or pooled data. Hypothesis tests on mean, median and
variance may be carried out, including testing against specific values, testing for
equality between series, or testing for equality within a single series when classified by
other variables (allowing you to perform one-way ANOVA). Tools for covariance and factor
analysis allow you to examine the relationships between variables.
You can visualize the distribution of your data using
histograms, theoretical distribution, kernel density, or cumulative distribution,
survivor, and quantile plots. QQ-plots (quantile-quantile plots) may be used to compare
the distribution of a pair of series, or the distribution of a single series against a
variety of theoretical distributions.
You can even perform Kolmogorov-Smirnov, Liliefors, Cramer
von Mises, and Anderson-Darling tests to see whether your series is distributed normally,
or whether it comes from another distribution such as an exponential, extreme value,
logistic, chi-square, Weibull, or gamma distribution.
EViews also produces scatter plots with curve fitting using
ordinary, transformation, kernel, and nearest neighbor regression. |
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| EViews performs a
wide range of basic statistical analysis. |
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| Examine the
distribution of your data. |
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| Add regression and
curve fitting (and histogram borders) to your scatterplots. |
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Time Series Statistics and Tools
Explore the time series
properties of your data with tools ranging from simple autocorrelation plots to frequency
filters, from Q-statistics to unit root tests.
EViews provides autocorrelation and partial autocorrelation
functions, Q-statistics, and cross-correlation functions, as well as unit root tests (ADF,
Phillips-Perron, KPSS, DFGLS, ERS, or Ng-Perron for single time series and
Levin-Lin-Chu, Breitung, Im-Pesaran-Shin, Fisher, or Hadri for panel data), cointegration
tests (Johansen for with MacKinnon-Haug-Michelis critical values and p-values ordinary
data, and Pedroni, Kao, or Fisher for panel data), causality, and independence tests.
EViews also provides easy-to-use front-end
support for the U.S. Census Bureau's X11 and X12-ARIMA seasonal adjustment programs, as
well as the Tramo/Seats software, which is quite frequently used by European researchers.
Simple seasonal adjustment using additive and multiplicative difference methods is also
supported in EViews.
You can even use EViews to compute trends and
cycles from time series data using the Hodrick-Prescott filter, Baxter-King,
Christiano-Fitzgerald fixed length and Christiano-Fitzgerald asymmetric full sample
band-pass (frequency) filters. |
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| Explore the time
series properties of your data. |
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| EViews provides
easy-to-use interfaces to X12 and Tramo/Seats. |
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| Use filters to
compute trends and cycles from your time series data. |
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Panel and Pooled Data Statistics and Tools
EViews features a wide variety of tools designed to facilitate working with both panel or pooled/time series-cross
section data. Define panel structures with virtually no limit on the number of
cross-sections or groups, or on the number of periods or observations in a group. Dated or
undated, balanced or unbalanced, and regular or irregular frequency panel data sets are
all handled naturally within the EViews framework.
Data structure tools
facilitate transforming your data from stacked (panel) to unstacked (pooled)
formats, and back again. Smart links, auto series, and data extraction tools, allow you to
slice, match merge, frequency convert, and summarize your data with ease.
Support for basic longitudinal data analysis ranges from convenient by-group and by-period
statistics, tests, and graphs, to sophisticated panel unit root (Levin-Lin-Chu,
Breitung, Im-Pesaran-Shin, or Fisher) and cointegration diagnostics (Pedroni
(2004), Pedroni (1999), and Kao, or the Fisher-type test).
Specialized tools for displaying panel data graphs allow you to view stacked, individual,
or summary displays. Display line graphs of each graph in a single graph frame or in
individual frames. Or show summary statistics for the panel data taken across
cross-sections, with mean (or median) and standard deviation (or quantile) bands. |
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Single Equation Estimation
EViews allows you to
choose from a full set of basic single equation estimators including: ordinary and
nonlinear least squares (multiple regression), weighted least squares, two-stage least
squares (instrumental variables), quantile regression (including least absolute deviations
estimation), and stepwise linear regression. Weighted
estimation is available for all of these techniques. Specifications may include
polynomial lag structures on any number of independent variables.
For time series analysis, EViews estimates ARMA and ARMAX models, and a wide range of ARCH specifications.
Structural time series models may be estimated using the state space object.
In addition to these basic estimators, EViews supports
estimation and diagnostics for a variety of advanced models.
Generalized Method of Moments (GMM)
EViews
supports GMM estimation for both cross-section and time series data
(single and multiple equation). Weighting options include the White
covariance matrix for cross-section data and a variety of HAC
covariance matrices for time series data. The HAC options include
prewhitening, a variety of kernels, and fixed, Andrews, or Newey-West
bandwith selection methods. You can estimate a GMM equation using
either iterative procedures, or a continuously updating procedure.
Post-estimation diagnostics for GMM equations, including weak
instrument statistics, are also available.
ARCH
If the variance of your series fluctuates over time,
EViews can estimate the path of the variance using a wide variety of Autoregressive
Conditional Heteroskedasticity (ARCH) models. EViews handles GARCH(p,q), EGARCH(p,q),
TARCH(p,q), PARCH(p,q), and Component GARCH specifications and provides maximum likelihood
estimation for errors following a normal, Student's t
or Generalized Error Distribution. The mean equation of ARCH
models may include ARCH and ARMA terms, and both the mean and variance equations allow for
exogenous variables.
Limited Dependent Variables
EViews
also supports estimation of a range of limited dependent variable
models. Binary, ordered, censored, and truncated models may be
estimated for likelihood functions based on normal, logistic, and
extreme value errors. Count models may use Poisson, negative binomial,
and quasi-maximum likelihood (QML) specifications. EViews optionally
reports generalized linear model or QML standard errors.
Panel and Pooled Time Series-Cross Section
EViews offers various panel and pooled data estimation
methods. In addition to ordinary linear and non-linear least-squares, equation estimation
methods include 2SLS/IV and Generalized 2SLS/IV, and GMM, which can be used to estimate
complex dynamic panel data specifications (including Anderson-Hsiao and Arellano-Bond
types of estimators).
Most of the methods allow for both time and cross-section
fixed and random effects specifications. For random effects models, quadratic unbiased
estimators of component variances include Swamy-Arora, Wallace-Hussain and
Wansbeek-Kapteyn.
Also supported are AR specifications (any effects are
defined after transformation), weighted least squares, and seemingly unrelated regression.
In pools, coefficients for specific variables (including AR terms) can be constrained to
be identical, or allowed to differ across cross-sections. |
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| EViews
offers a full range of single equation estimators. |
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| GMM
estimation offers a variety of weighting matrix and covariance options. |
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| Easy-to-use
dialogs make it easy to specify your ARCH model. |
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| EViews
estimates both ML and QML count models. |
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| EViews
offers a range of panel data estimators and options. |
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| An
(optional) wizard leads you through the specification of your dynamic panel data
model. |
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System Estimation
EViews also offers powerful tools for analyzing
systems of equations. You may use EViews to estimation
of both linear and nonlinear systems of equations by OLS, two-stage least squares,
seemingly unrelated regression, three-stage least squares, GMM, and FIML. The system may
contain cross equation restrictions and in most cases, autoregressive errors of any order.
Vector Autoregression/Error Correction Models
Vector Autoregression and Vector Error Correction models
can be easily estimated by EViews. Once estimated, you may examine the impulse response
functions and variance decompositions for the VAR or VEC. VAR impulse response functions
and decompositions feature standard errors calculated either analytically or by Monte
Carlo methods (analytic not available for decompositions) and may be displayed in a
variety of graphical and tabular formats.
You may impose and test linear restrictions on the
cointegrating relations and/or adjustment coefficients. EViews' VARs also allow you to
estimate structural factorizations (VARs) by imposing short-run (Sims 1986) or long-run
(Blanchard and Quah 1989) restrictions. Over-identifying restrictions may be tested using
the LR statistic reported by EViews.
VARs support a variety of views to allow you to examine the
structure of your estimated specification. With a few clicks of the mouse, you can display
the inverse roots of the characteristic AR polynomial, perform Granger causality and joint
lag exclusion tests, evaluate various lag length criteria, view correlograms and
autocorrelations, or perform various multivariate residual based diagnostics.
Multivariate ARCH
Multivariate ARCH is useful in modeling time varying
variance and covariance of multiple time series. A number of popular ARCH models, such as
the Conditional Constant Correlation (CCC), the Diagonal VECH, and the Diagonal BEKK, are
available. Exogenous variables are allowed in the mean and variance equations; nonlinear and
AR terms can be included in the mean equations. The error is assumed to
distributed either as
multivariate Normal or Student's t. Bollerslev-Wooldridge robust standard errors are also available.
Once the model is estimated, users can easily generate the in-sample variance,
covariance, or correlation, in tabular or graphic format.
State-Space Models
The state-space object allows estimation of a wide variety
of single- and multi-equation dynamic time-series models using the Kalman Filter
algorithm. Among other things, you can use the state-space object to estimate random and
time-varying coefficient models and ML ARMA specifications.
Sophisticated procs and views give you access to
powerful filtering and smoothing tools so that you can view or generate one-step ahead,
filtered, or smoothed signals, states, or errors. EViews' built-in forecasting procedures
also provide easy-to-use tools for in- and out-of-sample forecasting using n-step ahead or smoothed values. |
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| Specify and estimate
systems of equations using the system object. |
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| Estimate VAR or VEC models
and easily produce impulse response graphs. |
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| Model the system
covariances and correlations using multivariate ARCH. |
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| Estimate state space models
using the Kalman Filter and display filtered results. |
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User-Specified Maximum Likelihood
For custom analysis, EViews' easy-to-use likelihood object
permits estimation of user-specified maximum likelihood models. You simply provide
standard EViews expressions to describe the log likelihood contributions for each
observation in your sample, set coefficient starting values, and EViews will do the rest. |
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| Define your own estimator
using the likelihood object. |
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Part 3: Sophisticated Data Management
Powerful
analytic tools are only useful if you can easily work with your data.
EViews provides the widest range of data management tools available in
any econometric software. From its extensive library of mathematical,
statistical, date, string, and time series operators and functions, to
comprehensive support for numeric, character, and date data, EViews
offers the data handling features you’ve come to expect from modern
statistical software. |
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Extensive Function Library
EViews includes an extensive library of functions for working with data. In addition to standard mathematical
and trigonometric functions, EViews provides functions for descriptive statistics,
cumulative and moving statistics, by-group statistics, special functions, specialized date
and time series operations, workfile, value map, and financial calculations.
EViews also provides random number generators (Knuth,
L'Ecuyer or Mersenne-Twister), density functions and cumulative distribution functions for
eighteen different distributions.These may be used in generating new series, or in
calculating scalar and matrix expressions. |
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| EViews offers an
extensive library of functions. |
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Sophisticated Expression Handling
EViews' powerful tools for expression handling mean that you can use expressions virtually
anywhere you would use a series. You don't have to create new variables to work with the
logarithm of Y, the moving average of W, or the ratio of X to Y (or any other valid
expression). Instead, you can use the expression in computing descriptive statistics, as
part of an equation or model specification, or in constructing graphs.
When you forecast using an equation with an expression for
the dependent variable, EViews will (if possible) allow you to forecast the underlying
dependent variable and will adjust the estimated confidence interval accordingly. For
example, if the dependent variable is specified as LOG(G), you can elect to forecast
either the log or the level of G, and to compute the appropriate, possibly asymmetric,
confidence interval. |
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| Work directly with
expressions in place of variables. |
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Links, Formulas and Values Maps
Link objects allow you to create series that link to data contained in other workfiles or workfile
pages. Links allow you to combine data at different frequencies, or match merge in data
from a summary page into an individual page such that the data is dynamically updated
whenever the underlying data change. Similarly, within a workfile, formulas can be
assigned to data series so that the data series are automatically recalculated whenever
the underlying data is modified.
Value labels (e.g., "High", "Med",
"Low", corresponding to 2, 1, 0) may be applied to numeric or alpha series so
that categorical data can be displayed with meaningful labels. Built-in functions allow
you to work with either the underlying or the mapped values when performing calculations. |
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| Links may be used for
dynamic frequency conversion or match merging. |
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Data
Structures and Types
EViews can handle complex data structures, including regular and irregular dated data, cross-section data
with observation identifiers, and dated and undated panel data.
In addition to numerical data, an EViews workfile can also
contain alphanumeric (character string) data, and series containing dates, all of which
may be manipulated using an extensive library of functions.
EViews also provides a wide range of tools for working with
datasets (workfiles), data including the ability to combine series by complex match merge
criteria and workfile procedures for changing the structure of your data: join,
append, subset, resize, sort, and reshape (stack and unstack). |
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| EViews workfiles can
be highly structured. |
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| Alphanumeric and date
data are fully supported. |
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File Import and Export
Exchanging data with other programs is easy, since EViews reads and writes over 20 popular data
formats (including Excel, formatted and unformatted
ASCII/Text, SPSS, SAS (transport), Stata, SPSS, Html, Microsoft Access, Gauss
Dataset, Rats, GiveWin/PC Give, TSP, Aremos, dBase, Lotus, and binary files). Simply drag-and-drop your foreign file onto
EViews and your data will automatically appear in an EViews workfile. Or use the
easy-to-use dialogs and wizards to cutomize the importing of your data. |
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| EViews reads and
writes an extensive list of data formats. |
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EViews Databases
EViews provides sophisticated
built-in database features. An EViews database is a collection of EViews objects
maintained in a single file on disk. It need not be loaded into memory in order to access
an object inside it, and the objects in the database are not restricted to being of a
single frequency or range. EViews databases offer powerful query features which can be
used to search through the database for a particular series or select a set of series with
a common property.
Series contained in EViews databases may be copied
(fetched) into a workfile, or they may be accessed and used by EViews procedures without
being fetched into workfiles. In both cases, EViews will automatically perform frequency
conversion if necessary. Automatic search capabilities allow you to specify a list of
databases to be searched when a series you need cannot be found in the current workfile. |
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| Built-in database
tools offer powerful query features. |
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| Easily move data from
databases to your EViews workfiles. |
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Enterprise
Edition Support for ODBC, FAMETM, DRIBase, and Haver Analytics Databases
As part of the EViews Enterprise
Edition (an extra cost option over EViews Standard Edition), support is provided for
access to data contained in relational databases (via ODBC drivers) and to databases in a
variety of proprietary formats used by commercial data and database vendors. Open Database
Connectivity (ODBC) is a standard supported by many relational database systems including
Oracle, Microsoft SQL Server and IBM DB2. EViews allows you to read or write entire tables
from ODBC databases, or to create a new workfile from the results of a SQL query.
EViews Enterprise Edition also supports access to FAMETM
format databases (both local and server based) Global Insight's DRIPro and DRIBase
databanks, Haver Analytics DLX databases, Datastream, FactSet, and Moody's Economy.com.
The familiar, easy-to-use EViews database interface has been extended to these data
formats so that you may work with foreign databases as easily as native EViews databases. |
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| Read directly from
ODBC sources using the EViews Enterprise Edition. |
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| EViews Enterprise
Edition offers direct access to additional commercial vendor data formats. |
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Frequency Conversion
When you import data from a database or from another workfile or
workfile page, it is automatically converted to the frequency of your current project.
EViews offers many options for frequency conversion, and
includes support for the conversion of daily, weekly, or irregular-frequency data. Series
may be assigned a preferred conversion method, allowing you to use different methods for
different series without having to specify the conversion method every time a series is
accessed.
You can even create links so that the frequency converted
data series are automatically recalculated whenever the underlying data is modified. |
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| Specify a
series-specific automatic conversion or select a specific method. |
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Part 4: Presentation Quality Output
EViews
7 supports a wide range of basic graph types including line graphs, bar
graphs, filled area graphs, pie charts, scatter diagrams, mixed
line-bar graphs, high-low graphs, scatterplots, and boxplots. Any
number of graphs can be combined in a single graph for presentation.
EViews 7 supports a wide range of graph types
and features. |
Various options give you control over line types, symbols, color,
frame and border characteristics, headings, shading, and scaling, including logarithmic
scaling and dual scale graphs. Legends are created automatically. You may further
customize your graph by adding labels in any scalable Windows font.
Customizing a graph is as simple as modifying or moving
graphic elements on the screen. Everything from aspect ratios, to line and symbol
characteristics, to axes scaling and labeling is right at your fingertips. Want to change
the font or other characteristics of a legend or a text label? Just click on an element of
the graph and your choices are presented in an easy to understand dialog. You can even use
a customized graph template to modify all of your graph settings at once.
You can quickly incorporate customized graphs into
other applications using copy-and-paste or by writing the graph to a Windows metafile, or
a PostScript, bitmap, PNG, GIF, or JPEG file.
Export graphs in a variety of formations. |
Extensive table
customization tools allow you to produce presentation quality tables for inclusion in
other programs. An easy-to-use, interactive interface gives you control over cell font
face, size, and color, cell background color and borders, merging, and annotation.
EViews offers an extensive set of table
customization tools. |
When completed,
you can copy-and-paste your customized table to another application or save it as an RTF,
HTML, or text file. |
Part 5: Traditional Command Line and Programming
Point-and-click is great, but what if you feel more
comfortable entering commands? And what if you need programming capabilities? In addition
to its state-of-the-art windowing interface, EViews includes a powerful command language
that provides access to the features that are available through the menus.
All EViews features are
available via the command line. |
Modeled loosely after the BASIC programming language but with object-oriented extensions and
matrix handling capabilities, EViews allows you to enter individual commands for immediate
or batch execution. Your programs can make use of looping and condition branching, as well
as subroutine, macro, and string list processing.
Create program files for batch processing of commands. |
Matrix
primitives, from simple multiplication and inversion, to more advanced procedures for
Kronecker products, eigenvector solution, and singular value decomposition, provide you
with the tools you need for solving complex mathematical problems. |
EViews 7 offers a extensive array of powerful features for data
handling, statistics and econometric analysis, forecasting and
simulation, data presentation, and programming. While we can't possible
list everything, the following list offers a glimpse at the important
EViews features:
Basic Data Handling
- Numeric, alphanumeric (string), and date series; value labels.
- Extensive library of operators and statistical, mathematical, date and string functions.
- Powerful language for expression handling and transforming existing data using operators and functions.
- Samples and sample objects facilitate processing on subsets of data.
- Support
for complex data structures including regular dated data, irregular
dated data, cross-section data with observation identifiers, dated, and
undated panel data.
- Multi-page workfiles.
- EViews native, disk-based databases provide powerful query features and integration with EViews workfiles.
- Convert data between EViews and
various spreadsheet, statistical, and database formats, including (but
not limited to): Microsoft Access files, Excel files, Gauss dataset
files, ODBC Dsn files, ODBC Query files, SAS Transport files, native
SPSS files, SPSS Portable files, Stata files, Rats files, GiveWin
files, TSP Portable files, raw formatted ASCII text or binary files,
HTML. (Note: ODBC support is provided only in the Enterprise Edition).
- OLEDB support for reading EViews workfiles and databases using OLEDB-aware clients or custom programs.
- Excel Ad-in allows you to link or import data from EViews workfiles and databases from within Excel.
- Drag-and-drop
support for reading data; simply drop files into EViews for automatic
conversion of foreign data into EViews workfile format.
- Powerful tools for creating new workfile pages from values and dates in existing series.
- Match merge, join, append, subset, resize, sort, and reshape (stack and unstack) workfiles.
- Easy-to-use automatic frequency conversion which copying or linking data between pages of different frequency.
- Frequency conversion and match merging support dynamic updating whenever underlying data change.
- Auto-updating formula series that are automatically recalculated whenever underlying data change.
- Easy-to-use frequency conversion, simply copy or link data between pages of different frequency.
- Tools
for resampling and random number generation for simulation. Random
number generation for 18 different distribution functions using three
different random number generators.
Time Series Data Handling
- Integrated support for handling dates and time series data (both regular and irregular).
- Support for common regular frequency data (Annual,
Semi-annual, Quarterly, Monthly,
Bimonthly, Fortnight, Ten-day,
Weekly, Daily - 5 day week, Daily
- 7 day week).
- Support
for high-frequency (intraday) data, allowing for hours, minutes, and
seconds frequencies. In addition, there are a number of less commonly
encountered regular frequencies, including Multi-year, Bimonthly,
Fortnight, Ten-Day, and Daily with an arbitrary range of days of the
week.
- Specialized time series functions and operators: lags, differences, log-differences, moving averages, etc.
- Frequency conversion: various high-to-low and low-to-high.
- Exponential smoothing: single, double, Holt-Winters.
- Built-in tools for whitening regression.
- Hodrick-Prescott filtering.
- Band-pass (frequency) filtering: Baxter-King, Christiano-Fitzgerald fixed length and full sample asymmetric filters.
- Seasonal adjustment: X11, X12-ARIMA, Tramo/Seats, moving average.
- Interpolation to fill in missing values within a series: Linear, Log-Linear, Catmull-Rom Spline, Cardinal Spline.
Statistics
Basic
- Basic data summaries; by-group summaries.
- Tests
of equality: t-tests, ANOVA (balanced and unbalanced, with or without
heteroskedastic variances.), Wilcoxon, Mann-Whitney, Median Chi-square,
Kruskal-Wallis, van der Waerden, F-test, Siegel-Tukey, Bartlett,
Levene, Brown-Forsythe.
- One-way tabulation;
cross-tabulation with measures of association (Phi Coefficient,
Cramer’s V, Contingency Coefficient) and independence testing (Pearson
Chi-Square, Likelihood Ratio G^2).
- Covariance and correlation analysis including Pearson, Spearman rank-order, Kendall’s tau-a and tau-b and partial analysis.
- Principal components analysis including scree plots, biplots and loading plots, and weighted component score calculations.
- Factor
analysis allowing computation of measures of association (including
covariance and correlation), uniqueness estimates, factor loading
estimates and factor scores, as well as performing estimation
diagnostics and factor rotation using one of over 30 different
orthogonal and oblique methods.
- Empirical Distribution Function
(EDF) Tests for the Normal, Exponential, Extreme value, Logistic,
Chi-square, Weibull, or Gamma distributions (Kolmogorov-Smirnov,
Lilliefors, Cramer-von Mises, Anderson-Darling, Watson).
- Histograms, Frequency Polygons,
Edge Frequency Polygons, Average Shifted Histograms,
CDF-survivor-quantile, Quantile-Quantile, kernel density, fitted
theoretical distributions, boxplots.
- Scatterplots with parametric and
non-parametric regression lines (LOWESS, local polynomial), kernel
regression (Nadaraya-Watson, local linear, local polynomial)., or
confidence ellipses.
Time Series
- Autocorrelation, partial autocorrelation, cross-correlation, Q-statistics.
- Granger causality tests.
- Unit
root tests: Augmented Dickey-Fuller, GLS transformed Dickey-Fuller,
Phillips-Perron, KPSS, Eliot-Richardson-Stock Point Optimal, Ng-Perron.
- Cointegration tests: Johansen, Engle-Granger, Phillips-Ouliaris, Park added variables, and Hansen stability.
- Independence tests: Brock, Dechert, Scheinkman and LeBaron
- Variance
ratio tests: Lo and MacKinlay, Kim wild bootstrap, Wright's rank,
rank-score and sign-tests. Wald and multiple comparison variance ratio
tests (Richardson and Smith, Chow and Denning).
- Long-run
variance and covariance calculation: symmetric or or one-sided long-run
covariances using nonparametric kernel (Newey-West 1987, Andrews 1991),
parametric VARHAC (Den Haan and Levin 1997), and prewhitened kernel
(Andrews and Monahan 1992) methods. In addition, EViews supports
Andrews (1991) and Newey-West (1994) automatic bandwidth selection
methods for kernel estimators, and information criteria based lag
length selection methods for VARHAC and prewhitening estimation.
Panel and Pool
- By-group and by-period statistics and testing.
- Unit root tests: Levin-Lin-Chu, Breitung, Im-Pesaran-Shin, Fisher, Hadri.
- Cointegration tests: Pedroni, Kao, Maddala and Wu.
Estimation
Regression
- Linear and nonlinear ordinary least squares (multiple regression).
- Linear regression with PDLs on any number of independent variables
- Analytic derivatives for nonlinear estimation.
- Weighted least squares.
- White
and Newey-West robust standard errors. HAC standard errors may be
computed using nonparametric kernel, parametric VARHAC, and prewhitened
kernel methods, and allow for
Andrews and Newey-West automatic bandwidth selection
methods for kernel estimators, and information criteria based lag
length selection methods for VARHAC and prewhitening estimation.
- Linear quantile regression and
least absolute deviations (LAD), including both Huber’s Sandwich and
bootstrapping covariance calculations.
- Stepwise regression with 7 different selection procedures.
ARMA and ARMAX
- Linear models with autoregressive moving average, seasonal autoregressive, and seasonal moving average errors.
- Nonlinear models with AR and SAR specifications.
- Estimation using the backcasting method of Box and Jenkins, or by conditional least squares.
Instrumental Variables and GMM
- Linear
and nonlinear two-stage least squares/instrumental variables (2SLS/IV)
and Generalized Method of Moments (GMM) estimation.
- Linear and nonlinear 2SLS/IV estimation with AR and SAR errors.
- Limited Information Maximum Likelihood (LIML) and K-class estimation.
- Wide range of GMM weighting matrix specifications (White, HAC, User-provided) with control over weight matrix iteration.
- GMM estimation options include continuously updating estimation (CUE), and a host of new
standard error options, including Windmeijer standard errors.
- IV/GMM specific diagnostics include Instrument Orthogonality Test, a
Regressor Endogeneity Test, a Weak Instrument Test, and a GMM specific
breakpoint test
ARCH/GARCH
- GARCH(p,q), EGARCH, TARCH, Component GARCH, Power ARCH, Integrated GARCH.
- The
linear or nonlinear mean equation may include ARCH and ARMA terms; both
the mean and variance equations allow for exogenous variables.
- Normal, Student’s t, and Generalized Error Distributions.
- Bollerslev-Wooldridge robust standard errors.
- In- and out-of sample forecasts of the conditional variance and mean, and permanent components.
Limited Dependent Variable Models
- Binary Logit, Probit, and Gompit (Extreme Value).
- Ordered Logit, Probit, and Gompit (Extreme Value).
- Censored and truncated models with normal, logistic, and extreme value errors (Tobit, etc.).
- Count models with Poisson, negative binomial, and quasi-maximum likelihood (QML) specifications.
- Huber/White robust standard errors.
- Count models support generalized linear model or QML standard errors.
- Hosmer-Lemeshow and Andrews Goodness-of-Fit testing for binary models.
- Easily save results (including generalized residuals and gradients) to new EViews objects for further analysis.
- General GLM estimation engine may be used to estimate several of these models.
Panel Data/Pooled Time Series, Cross-Sectional Data
- Linear and nonlinear estimation with additive cross-section and period fixed or random effects.
- Choice of quadratic unbiased
estimators (QUEs) for component variances in random effects models:
Swamy-Arora, Wallace-Hussain, Wansbeek-Kapteyn.
- 2SLS/IV estimation with cross-section and period fixed or random effects.
- Estimation with AR errors using nonlinear least squares on a transformed specification
- Generalized
least squares, generalized 2SLS/IV estimation, GMM estimation allowing
for cross-section or period heteroskedastic and correlated
specifications.
- Linear dynamic panel data
estimation using first differences or orthogonal deviations with
period-specific predetermined instruments (Arellano-Bond).
- Robust standard error calculations include seven types of robust White and Panel-corrected standard errors (PCSE).
- Testing of coefficient restrictions, omitted and redundant variables, Hausman test for correlated random effects.
- Panel
unit root tests: Levin-Lin-Chu, Breitung, Im-Pesaran-Shin, Fisher-type
tests using ADF and PP tests (Maddala-Wu, Choi), Hadri.
Generalized Linear Models
- Normal, Poisson, Binomial, Negative Binomial, Gamma, Inverse Gaussian, Exponential Mena, Power Mean, Binomial Squared families.
- Identity,
log, log-complement, logit, probit, log-log, complimentary log-log,
inverse, power, power odds ratio, Box-Cox, Box-Cox odds ratio link
functions.
- Prior variance and frequency weighting.
- Fixed, Pearson Chi-Sq, deviance, and user-specified dispersion specifications. Support for QML estimation and testing.
- Quadratic Hill Climbing, Newton-Raphson, IRLS - Fisher Scoring, and BHHH estimation algorithms.
- Ordinary
coefficient covariances computed using expected or observed Hessian or
the outer product of the gradients. Robust covariance estimates using
GLM or Huber/White methods.
Single Equation Cointegrating Regression
- Support
for three fully efficient estimation methods, Fully Modified OLS
(Phillips and Hansen 1992), Canonical Cointegrating Regression (Park
1992), and Dynamic OLS (Saikkonen 1992, Stock and Watson 1993
- Engle
and Granger (1987) and Phillips and Ouliaris (1990) residual-based
tests, Hansen's (1992b) instability test, and Park's (1992) added
variables test.
- Flexible specification of the trend and deterministic regressors in the equation and cointegrating regressors specification.
- Fully featured estimation of long-run variances for FMOLS and CCR.
- Automatic or fixed lag selection for DOLS lags and leads and for long-run variance whitening regression.
- Rescaled OLS and robust standard error calculations for DOLS.
User-specified Maximum Likelihood
- Use standard EViews series expressions to describe the log likelihood contributions.
- Examples for multinomial and
conditional logit, Box-Cox transformation models, disequilibrium
switching models, probit models with heteroskedastic errors, nested
logit, Heckman sample selection, and Weibull hazard models.
Systems of Equations
Basic
- Linear and nonlinear estimation.
- Least squares, 2SLS, equation weighted estimation, Seemingly Unrelated Regression, Three-Stage Least Squares
- GMM with White and HAC weighting matrices.
- AR estimation using nonlinear least squares on a transformed specification.
- Full Information Maximum Likelihood (FIML).
VAR/VEC
- Estimate structural factorizations in VARs by imposing short- or long-run restrictions.
- Impulse
response functions in various tabular and graphical formats with
standard errors calculated analytically or by Monte Carlo methods.
- Impulse response shocks
computed from Cholesky factorization, one-unit or one-standard
deviation residuals (ignoring correlations), generalized impulses,
structural factorization, or a user-specified vector/matrix form.
- Impose and test linear restrictions on the cointegrating relations and/or adjustment coefficients in VEC models.
- View or generate cointegrating relations from estimated VEC models.
- Extensive
diagnostics including: Granger causality tests, joint lag exclusion
tests, lag length criteria evaluation, correlograms, autocorrelation,
normality and heteroskedasticity testing, cointegration testing, other
multivariate diagnostics.
Multivariate ARCH
- Conditional Constant Correlation (p,q), Diagonal VECH (p,q), Diagonal BEKK (p,q), with asymmetric terms.
- Extensive parameterization choice for the Diagonal VECH's coefficient matrix.
- Exogenous variables allowed in the mean and variance equations; nonlinear and AR terms allowed in the mean equations.
- Bollerslev-Wooldridge robust standard errors.
- Normal or Student's t multivariate error distribution
- A choice of analytic or (fast or slow) numeric derivatives. (Analytics derivatives not available for some complex models.)
- Generate covariance, variance, or correlation in various tabular and graphical formats from estimated ARCH models.
State Space
- Kalman filter algorithm for estimating user-specified single- and multiequation structural models.
- Exogenous variables in the state equation and fully parameterized variance specifications.
- Generate one-step ahead, filtered, or smoothed signals, states, and errors.
- Examples include time-varying parameter, multivariate ARMA, and quasilikelihood stochastic volatility models.
Testing and Evaluation
Forecasting and Simulation
- In-
or out-of-sample static or dynamic forecasting from estimated equation
objects with calculation of the standard error of the forecast.
- Forecast graphs and in-sample forecast evaluation: RMSE, MAE, MAPE, Theil Inequality Coefficient and proportions
- State-of-the-art model building tools for multiple equation forecasting and multivariate simulation.
- Model equations may be entered in text or as links for automatic updating on re-estimation.
- Display dependency structure or endogenous and exogenous variables of your equations.
- Gauss-Seidel, Broyden and Newton model
solvers for non-stochastic and stochastic simulation. Non-stochastic
forward solution solve for model consistent expectations. Stochasitc
simulation can use bootstrapped residuals.
- Solve control problems so that endogenous variable achieves a user-specified target.
- Sophisticated equation normalization, add factor and override support.
- Manage and compare multiple solution scenarios involving various sets of assumptions.
- Built-in model views and procedures display simulation results in graphical or tabular form.
Graphs and Tables
- Line,
dot plot, area, bar, spike, seasonal, pie, xy-line, scatterplots,
boxplots, error bar, high-low-open-close, and area band.
- Powerful, easy-to-use categorical and summary graphs.
- Auto-updating graphs which update as underlying data change.
- Observation info and value display when you hover the cursor over a point in the graph.
- Histograms,
average shifted historgrams, frequency polyons, edge frequency
polygons, boxplots, kernel density, fitted theoretical distributions,
boxplots, CDF, survivor, quantile, quantile-quantile.
- Scatterplots
with any combination parametric and nonparametric kernel
(Nadaraya-Watson, local linear, local polynomial) and nearest neighbor
(LOWESS) regression lines, or confidence ellipses.
- Interactive point-and-click or command-based customization.
- Extensive customization of graph
background, frame, legends, axes, scaling, lines, symbols, text,
shading, fading, with improved graph template features.
- Table customization with control over
cell font face, size, and color, cell background color and borders,
merging, and annotation.
- Copy-and-paste graphs into other
Windows applications, or save graphs as Windows regular or enhanced
metafiles, encapsulated PostScript files, bitmaps, GIFs, PNGs or JPGs.
- Copy-and-paste tables to another application or save to an RTF, HTML, or text file.
- Manage graphs and tables together in a spool object that lets you display multiple results and analyses in one object
Commands and Programming
- Object-oriented command language provides access to menu items
- Batch execution of commands in program files.
- Looping and condition branching, subroutine, and macro processing.
- String and string vector objects for string processing. Extensive library of string and string list functions.
- Extensive
matrix support: matrix manipulation, multiplication, inversion,
Kronecker products, eigenvalue solution, and singular value
decomposition.
- EViews COM automation server support
so that external programs or scripts can launch or control EViews,
transfer data, and execute EViews commands.
- EViews
offers COM Automation client support application for MATLAB and R
servers so that EViews may be used to launch or control the
application, transfer data, or execute commands.
- The
EViews Excel Add-in offers a simple interface for fetching and linking
from within Microsoft Excel (2000 and later) to series and matrix
objects stored in EViews workfiles and databases.
EViews
7 features a wide range of exciting changes and improvements. The
following is an overview of the most important new features in Version
7.
Performance
- Optimized routines for faster computation.
- Multi-processor/core support with custom user settings.
EViews Interface
- "Theme" support lets you customize the appearance of your EViews windows.
- Enhanced drag-and-drop support throughout the program.
- Improved command entry interface with enhanced command editing and recall, and undocking of the command window.
- Improved graph options interface.
- Updated global options interface.
- Auto-update from the web ensures that your copy of EViews 7 is always up-to-date.
Data Handling
- New workfile data frequencies:
high-frequency (Intraday) data, with full support for hours, minutes,
and seconds frequencies, multi-year, bimonthly, fortnight, 10-day, and
daily with an arbitrary range of days of the week.
- Greatly enhanced support for strings,
including new string and string vector objects, an extensive library of
new functions for creating and manipulating string lists, and improved
programming support.
- EViews now offers direct support for connecting to, opening, querying, and importing from the FRED® (Federal Reserve Economic Data) database.
- Support for reading Excel 2007 XLSX Files.
- Improved data import featuring more powerful command line tools for reading foreign data into an existing workfile.
Graphs
- New "live" graphs auto-update as the underlying data change.
- Improved graph options interface.
- Interactive observation info display lets you inspect labels and values associated with point on a graph.
- Improved control over formatting of dates in the observation scale/axis.
- More flexible custom observation labels for the observation scale/axis.
- Added control over date label positioning and two row labeling.
- Enhanced control over date/observation axis grid line placement.
Programming Support
- User-defined dialog functions allow you to create dialogs to interact with users.
- Programs now support message logging.
- Program file editor supports quick multi-line commenting.
- Greatly enhanced support for strings,
including new string and string vector objects, an extensive library of
new functions for creating and manipulating string lists, and improved
programming support.
- Enhanced support for text objects.
- New object data members.
- New general information functions.
External Interfaces
- The new EViews Microsoft Excel Add-in offers a simple interface for reading data stored in EViews workfiles and databases from within Microsoft Excel.
- External programs may use the new EViews OLEDB driver to read data stored in EViews workfiles (WF1) and EViews databases (EDB).
- You may use the EViews COM automation server by creating scripts or programs that launch or control EViews, transfer data, and execute EViews commands.
- EViews COM Automation Client Support for MATLAB and R allows you to use EViews to interact with the powerful programming languages of MATLAB and R.
Econometrics and Statistics
Computation
- Interpolation tools (Linear, Log-linear, Catmul-Rom Spline, Cardinal Spline) are now offered as a series procedure.
- Whitening is now offered as a series or group procedure.
- Long-run variances and covariances may now be calculated from a series or group of series.
- Variance ratio testing for a random walk or martingale in a series.
- Single equation tests for cointegration are provided for a group of series or for an equation estimated using cointegrating regression.
Estimation
- Greatly improved single equation Instrumental Variables/Two-Stage Least Squares and GMM estimation (with new support for LIML and K-class estimation).
- Bult-in support for specification and eatimation of single equation cointegrating regression.
- Support for specification and estimation of Generalized Linear Models.
- New methods of specifying weights for weighted least squares.
Diagnostics
- Expanded choice of coefficient covariance estimators for single equation regression models.
- Enhanced post-estimation diagnostics for single equation regression models.
- New test and diagnostic views for TSLS and GMM equations.
| |
EViews
7 |
Maximum observations per series |
4 million (by default), may be increased if
desired, subject to memory restrictions |
Total observations: (series x obs per series) |
limited only by available RAM |
Maximum objects per workfile |
limited only by available RAM |
Maximum objects per database |
limited to 10 million objects, 64 gigabytes or
available disk space |
| |
|
Maximum observations per series |
4 million (by default), may be increased if
desired, subject to memory restrictions (saving and exporting are
only available for dataset with fewer than 1,500 observations per series*) |
Total observations: (series x obs per series) |
limited only by available RAM
(saving and exporting are only available for dataset with fewer than 15,000 total
observations*) |
Maximum objects per workfile |
limited only by available RAM
(saving and exporting are only available for workfile with fewer than 60 objects*) |
Maximum objects per database |
Cannot
save/store data into database, but can fetch/read from one |
*Note: The Student
Version places “soft” capacity restrictions on the amount of
data (1,500 observations per series, 15,000 total observations, 60
objects) that may be saved or exported. Students may, without
restriction, work with larger amounts of data, but workfiles that
exceed the soft limits may not be saved nor the data exported. |
"…an enhanced version of EViews 7…with support
for ODBC and the proprietary data formats of several commercial data and
database vendors"…
EViews 7 Enterprise Edition is an
enhanced version of EViews 7.The
Enterprise Edition contains all of the features of EViews 7, plus support
for ODBC and the proprietary data formats of several commercial data and
database vendors.
Specifically, the Enterprise Edition allows
direct access to ODBC1 databases or queries and provides transparent connection
to Global Insight's DRIPro and DRIBase databanks2, Haver Analytics DLX3,
FAMETM 4 format databases, EcoWin5 databases, Datastream6, FactSet7 and Moody's
Economy.com8. The familiar, easy-to-use EViews database interface has been extended to
these data formats so that you may work with foreign databases as easily as native EViews
databases.
1ODBC,
short
for Open DataBase Connectivity, is a standard database access method. With ODBC support,
EViews Enterprise Edition allows users direct access to standard databases such as Oracle,
Microsoft SQL Server, IBM DB2, or Sybase. (For a technical description, see http://www.webopedia.com/TERM/O/ODBC.html.)
2Please
contact Global Insight directly for details (http://www.globalinsight.com).
3The Haver
database format is a binary format used by Haver Analytics when distributing data (http://www.haver.com).
4The FAMETM format is a binary
format written by FAMETM database products. FAMETM provides a variety of products and services for working with time
series data (http://www.fame.com).
5Information
on EcoWin data services can be found at (http://www.ecowin.com/).
6Datastream
is a data service of Thomson Reuters (http://www.thomsonreuters.com/).
Access to Datastream data from within EViews requires Thomson
Reuters Datafeeds.
7Please
contact FactSet Research Systems for details (http://www.factset.com/).
8For
additional information, see
Moody's Economy.com (http://www.economy.com/).
CPU: |
Pentium or better |
Operating System: |
Windows
2000, Windows 2003, Windows XP (32bit or 64bit), Windows Vista (32bit
or 64bit), Windows Server 2008 (32bit or 64bit), Windows 7 (32bit or
64bit). |
Memory: |
32 MB for Windows 98, Me or NT
64 MB for Windows 2000, 2003
256 MB Windows XP
512 MB Windows Vista or Windows 7 |
Disk Space: |
202
MB of available hard disk space for the EViews executable, supporting
files, full documentation, and example files. 75 MB for EViews
executable and supporting files only. |
Hardware: |
CD-ROM |
|