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RATS v7.10 -
Latest version now available!
RATS (Regression
Analysis of Time Series) is a fast, efficient, and comprehensive
command driven time series analysis and econometrics software
package. RATS commands are simple to use. This makes simple tasks
easy to accomplish, while its command-driven interface and extensive
programmability also make it a very flexible and powerful tool for
more complex jobs.
The Windows and
Macintosh versions feature an interactive editor that allows you to
create, test, and run RATS programs; view, save, and print text and
graphs and access on-line help. While running in interactive mode,
you can quickly experiment with different models or procedures,
without having to repeat earlier steps each time. The editor also
includes menu-driven Wizards for many tasks, including reading in
data, running regressions, doing hypothesis tests, graphing results,
and more. The editor also an extensive help system (handled as HTML
files on the Mac version), toolbar icons for common operations, the
ability to display information in spreadsheet-style windows.
All versions of
RATS also offer batch mode operation. In batch mode, RATS
automatically reads and executes instructions from one or more input
files, and saves the output to disk.
Here are some of the things you can do with RATS:
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Manage data sets and do a variety of data transformations.
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Estimate many kinds of regression models, including ordinary,
weighted, and generalized least squares, seemingly unrelated
regressions (SUR), non-linear least squares, non-linear systems,
generalized method of moments, ARCH and GARCH models, and other
maximum-likelihood models.
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Perform virtually any time series technique in use, including ARIMA
models, transfer function and intervention models, vector
autoregressions (VAR's), and spectral analysis.
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Generate forecasts and run simulations.
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Create, save, print, and export high-quality time series graphs and
scatter plots.
New Features
- New menu-driven Wizard for Panel Data Regressions
- Pro versions now include ODBC/SQL support, and support for
reading CRSP data.
- DECLARE can now be used in a loop, procedure, or other
compiled section. This makes putting existing code into a loop or
a procedure. Also LOCAL commands can now be used anywhere in a
compiled section (rather than just at the beginning), and can now
include dimension fields for arrays.
- New options on BOOT for doing block bootstrapping.
- New KALMAN options for doing "dummy observation" priors.
- FILTER now has an option for removing trends or seasons via
regression.
RATS Products
There are products
that complement the RATS software package
CATS (Cointegration Analysis of Time Series) is a suite of
procedures written in the RATS language that implement the Johansen-Juselius
cointegration analysis testing and estimation methodology. Latest
CATS v2.0 is released!
The CATS v2.0 procedure
requires RATS 6.20 and above. This is available on PC, Macintosh and
UNIX platforms.
X11
is an optional feature that adds the Census Bureau's X11
seasonal adjust procedure as a built-in instruction in RATS. This
feature is now included in the new "Professional" version of WinRATS
and MacRATS.
The
X11 module is part of the "Professional" version of WinRATS and
MacRATS. The Professional version of WinRATS also includes support
for reading data from FAME-format databases. The X11 module is
available as an add-on option for UNIX and Linux versions of RATS.
A Quick Example
We've typed in a few commands to define a
quarterly dating scheme, read in a series called PPI from a data
file, compute the natural log transform of PPI, and then estimate an
ARIMA(1,1,0) model. RATS automatically executes each instruction
when we hit the <Enter> key at the end of each line. A portion of
the resulting output is shown in the output window:
Suppose we wanted to try a different ARIMA model
specification. Note that we do not need to re-execute the
first four instructions (the "calendar" scheme is still in effect,
and the data series are still in memory). We just need to type in a
new BOXJENK command, modify and re-execute the existing
command, or use the menu driven "Box-Jenkins Models" Wizard
to estimate our new ARIMA model.
For example, if we want to try an ARIMA(0,1,1)
model, we could type in:
boxjenk(diffs=1,constant,ma=1)
logppi
When we hit the <Enter> key, the new model will be
estimated, and the new output appended to the information already
shown in the output window.
RATS functions:
RATS now offers menu- and dialog-driven
Wizards for many of the most important tasks. Here's a look at
the choices available on the Wizards menu (as of Version 6.10):
There are many common econometrics tasks can be
handled exclusively using Wizards.
And, because the Wizards actually generate
corresponding RATS instructions and paste them into the input
window, you can save what you've done as a program file, which can
then be re-executed at a later date with just a couple of mouse
clicks. Here is an example of one of these Wizards.
The fields in the dialog box allow you to
select the estimation method and dependent variable, add any
existing series as contemporaneous or lagged regressors or
instruments, adjust the sample range, and turn on options such as
the Robust Standard Errors correction.
In this example, we have seven series loaded
into memory, and these are all displayed in the "Available" box, in
addition to the pre-defined "Constant" regressor. We've used the "<<
Add <<" button to select 4 explanatory variables, and used the
"Dependent Variable" drop-down list to select FOODCONS as the
dependent variable.
When we click on "OK", RATS will generate the
appropriate instruction with the selected options and parameters,
paste it into the "input" window, and execute the command.
Graphics Examples
Simple Time Series
Graph
Stacked Bar Graph
 
Two-scale Graph
Multiple Graphs on a Single Page
 
RATS can draw
multiple graphs on a single page due to the SPGRAPH instruction.
For example, here is a full set of impulse response graphs
generated using our MONTEVAR.PRG example program:
Evaluation Copy
We provide an evaluation copy of RATS software. The evaluation copy
is the full version of the software allowing the user to install it
on their computer for 1 month. The price for the evaluation copy is Singapore
Dollars
250 (for Singapore) and Singapore Dollars 330 (for overseas). This fee is deducted
from the purchase price if the software is ordered within 30 days
from the completion date of the evaluation. The fee covers postage
and administration costs.
PRICING AND ORDER INFORMATION
Please contact us for additional information
about RATS & its products, including price quotes at
rats@eastasiatc.com.sg
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