RATS / CATS 是一套群昱公司代理的時間序列統計計量軟體,搭配 CATS 模組,可透過一連串的對話方塊,進行學業界最先進複雜的共整合分析,甚至可進行I(2)模型分析。RATS能支援Windows, Macintosh、UNIX和Linux,以完全相容跨平台。
RATS (Regression Analysis of Time Series) is a fast, efficient, and comprehensive econometrics and time series analysis software package. For more than two decades, it has been the econometrics software of choice at universities, central banks, and corporations around the world. Our current release, Version 9.2, is easier to use than ever while continuing to offer the most advanced tools available for cutting-edge econometrics research.
We’ll take a closer look at the RATS program below. For more details, see the List of Features page or click on any of the menu items at left
RATS provides all the basics you expect, including linear and non-linear least squares, forecasting, SUR, and ARIMA models. But it goes far beyond that, with support for techniques like GMM, ARCH and GARCH models, state space models, and more. RATS also offers unmatched support for Vector Autoregression models, and is one of the few programs to offer spectral analysis capabilities.
RATS can handle time series of virtually any frequency, including daily and weekly, as well as panel and cross-section data.
Menu-driven data wizards and support for reading various text, spreadsheet, and database file formats make it easy to get your data into RATS. Our Professional version adds support for more database formats, including SQL/ODBC data access, for even more flexibility.
Our interactive RATS Editor environment allows you to quickly implement econometric analysis tasks, and makes it easy to try different model specifications or techniques without having to rerun entire programs.
You can save your work as a RATS program, allowing you to reproduce your results at any time with just a couple of mouse clicks.
(click on images to enlarge)
The editor also offers more than 40 menu-driven Wizards that provide point-and-click access to most common tasks, including reading data, displaying graphs, doing transformations, estimating a variety of models, and hypothesis testing. These help make RATS an ideal tool for new users and for use in educational settings.
When you use a Wizard, RATS displays the corresponding commands in the editor window so you can actually learn the RATS language through using the Wizards. This also allows you to use the Wizards to build complete programs that can be re-executed again later.
An often-overlooked aspect of econometric research is ensuring that results are reported accurately. RATS addresses this with a powerful report-generation feature for quickly generating accurate tables of reports, which you can export to text or spreadsheet files for direct inclusion in papers and presentations.
Below: The ARCH/GARCH Wizard dialog box At Right: The Time Series Wizard menu
RATS allows you to create publication-quality time series graphs, scatter plots, and contour graphs.
The command-driven language at the heart of the program remains easy to learn and use for simple jobs, but its extensive programming capabilities also allow you to handle much more complex tasks. Features include user-definable procedures and functions, looping and program control instructions, and the ability to create user-defined menus and dialog boxes. With these capabilities, you can automate complex or repetitive tasks, and even write sophisticated menu- and dialog-driven end-user applications.
All versions of RATS also offer “batch mode” operation. You can run jobs several ways: from the command line; by dragging and dropping files; or by double-clicking on a desktop icon. This is especially helpful for users who need to run the same jobs on a regular basis.
RATS is available for Windows, Macintosh, UNIX and Linux, with complete compatibility across platforms. You can share programs, data files, output, and graph files across any of these platforms with no translation required.
Below is a listing of many of the key features supported by RATS. Please note that RATS is designed to be a very powerful and flexible program, so there is no way we can list all of its capabilities here. If, after looking over this list, you are not sure that RATS can do what you need, just ask us. You can e-mail us at [email protected] and we’ll do our best to answer your question.
CATS (Cointegration Analysis of Time Series) is a set of cointegration analysis procedures written by Jonathan G. Dennis, Katarina Juselius, Sören Johansen and Henrik Hansen of the University of
Copenhagen for use with our RATS software.
CATS provides a wide variety of tools for analyzing your data and choosing and testing a cointegration model. The program is almost completely menu- and dialog-driven. You begin by running a short RATS program to define your data and load the CATS procedure. This adds several CATS menus to the RATS menu bar, and you perform your analysis by selecting operations from these menus. CATS will prompt you for any needed input. See CATS 2: A Closer Look for screen shots showing some of the menu operations.
See CATS 2.0 for more details on CATS 2.0.
The CATS 2.0 package includes the CATS procedure on CD and a completely revised 200-page manual describing the econometrics of the cointegrated VAR model and how to interpret the output. All features of the program are illustrated by a worked example. The manual also includes a technical appendix describing the mathematics of CATS. Sample data and set-up files for the illustrative examples are also included.
Note that you must have a copy of the RATS software in order to use CATS. CATS 2.0 will work with Version 6.2 or later of RATS.
CATS 2.0 was developed in conjunction with the creation of the book The Cointegrated VAR Model by Katarina Juselius. Although the book is certainly not required to use CATS, we think anyone interested in cointegration analysis, and particularly anyone using CATS to do cointegration analysis, will find it extremely helpful.
A PDF “Handbook” to accompany the book is now available as part of a freely downloadable zip file. The handbook describes how to use CATS 2.0 to reproduce the results from the textbook. This zip files includes the example programs and data file with the PDF book describing the steps taking and discussing the results.
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