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Stata 12: Data analysis and statistical software
Stata is a complete, integrated statistical package that provides everything you need for data analysis, data management, and graphics. Stata is not sold in modules, which means you get everything you need in one package. And, you can choose a perpetual license, with nothing more to buy ever. Annual licenses are also available.
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Developer: Latest release: Operating systems: Type: |
StataCorp Stata 12 (July 2011) Windows; Mac OS X; Unix; Linux Data Analysis and statistical software |
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Contents:
- New features in Stata 12
- Screenshots
- System requirements
- Prices
- Additional information
- Upgrade information for recent Stata 11 purchases
- Stata 12 release notes
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New features in Stata 12
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Structural equation modelling (SEM)
Stata 12 includes complete implementation of structural equation modelling (SEM). Additionally, there is a separate SEM Reference Manual available to users.
Path diagrams, standardised and unstandardised estimates, modification indices, direct and indirect effects, score tests, Wald tests, factor scores and other predictions, goodness of fit, estimation with groups and tests of invariance, seemingly unrelated regression (SUR), instrumental variables, FIML and LIML estimation of simultaneous equations, maximum likelihood estimation, GMM estimation, clustered data, survey data and missing at random (MAR) data are all now included in Stata 12. Each feature has been implemented for expansive datasets and for large models.
This feature is particularly useful for psychologists and anyone that fits linear regressions, multivariate regressions, seemingly unrelated regressions, or simultaneous systems, or anyone who uses generalised method of moments (GMM). SEM is also a very flexible framework to work within.
Contrasts and pairwise comparisons
Stata 12 capabilities include linear and nonlinear models, comparison of means, intercepts, slopes, comparison of adjacent categories, comparisons with reference categories, comparisons with a grand mean, treatment effects, orthogonal polynomials, adjustments for multiple comparisons and graphs.
Contrast and pairwise comparison (pwcompare) commands are now available, allowing the user to factor variables after every estimation command.
Multiple imputation
Many new additions have been made to multiple imputation (MI) in Stata 12. As testament to this, the MI manual for Stata 12 has grown by 90 pages upon previous releases.
New MI features include chained equations, imputation of continuous, ordinal, cardinal and count variables, conditional imputation, imputation separately within groups, support for panel data and multilevel models and linear and nonlinear predictions.
Time-series
This is another area where Stata 12 has been widely improved. This is highlighted by the time-series manual expanding from 537 to 710 pages.
New time-series features include:
- Multivariate GARCH: Stata 12 includes constant conditional correlations, dynamic conditional correlations, varying conditional correlations, level predictions, variance predictions, and dynamic forecasts.
- Autoregressive fractionally integrated moving average (ARFIMA) models: featuring long memory processes, predictions, fractional integration predictions, and dynamic forecasts.
- Unobserved-components models (UCMs): including trend, seasonal, and cyclical components, prediction of components, and dynamic forecasts.
- Spectral density: with parametric estimates after ARIMA, ARFIMA, and UCM.
- Time-series filters: including Christiano-Fitzgerald, Baxter-King band-pass filters, Hodrick-Prescott high-pass filters and Butterworth high-pass filters.
- Business calendars: Users can define their own calendars in Stata 12 so that dates display correctly and lags and leads work as they should. For instance, a user might create a file that recorded the days the London Stock Exchange is open. Say that file was named lse.stbcal, Stata would then understand the format %tblse, just as it understands the usual date format %td.
Contour plots
Stata 12 includes both filled and outlined plots.
Multilevel / mixed models
Stata 12 can perform estimations with complex survey data, made possible with xtmixed, including multilevel sampling weights and robust variance estimators. This puts Stata at the forefront of handling survey data in linear mixed models.
ROC analysis
ROC capabilities have been greatly expanded in Stata 12. ROC is documented in the Base Reference Manual. Documentation went from 32 pages to 121. New features include ROC adjusted for covariates - you can model sensitivity and specificity of a diagnostic test to take into account prognostic factors such as age and gender. You can also easily graph the estimated ROC curves that result from these models.
New commands that correspond with Windows OS interface
Stata 12 has the capability to import excel and export excel read and write worksheets from Microsoft Excel file formats, .xls and .xlsx. In addition, there is a new Import Preview tool which lets you see the files contents and adjust import settings before you import the data. Support for importing EBCDIC files has also been added.
Interface enhancements
- Stata has many new features and enhancements. The screen layout has also been redesigned to better fit wide screens.
- New properties window which lets you manage your variables, including their names, labels, value labels, notes, formats and storage types.
- The Data Editor also has a new properties window with tools that allow you to Hide, Show, Filter, and Reorder the variables. In addition their is also a new Clipboard Preview tool that lets you see and prepare your raw data before pasting. The Review and Variables windows also support filtering (searching) and you can also search in the Results window.
- Automatic memory management is one of those features that is difficult to appreciate before you actually use it. No more setting of memory. Stata automatically adjusts its memory usage up and down according to current requirements.
- Improved help files is another feature that is difficult to appreciate before using it. The Viewer shows help files with pulldown menus for the dialog box, the "Also see" entries, and a "Jump to" pulldown that includes each of the main sections in the help file so users can jump quickly to the information that they want to see. For instance, a user could click on "Examples" in the "Jump to" pulldown to go directly to the examples for the command.
PDF export of results and graphs
Stata 12 gives the user the ability to export their findings in PDF format.
More…
There are many more new features in Stata 12 including more improvements in the Stata interface, "Data-Editor", and "Do-file Editor", plus more parallelised commands and speed ups in Stata/MP versions.
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Screenshots
To view larger versions of the screenshots, click on the images below to view in a new tab.
SEM path diagram |
Contour plots |
Unobserved components model |
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System requirements
Learn about running Stata on a dual-core, multi-core or multi-processor computer.
Stata for Windows:
- Windows 7 *
- Windows Vista *
- Windows XP Pro/Home *
- Windows Server 2008 *
- Windows Server 2003 *
- Windows 2000 Pro/Server *
* 32-bit and 64-bit Windows varieties for x86, x86-64, and Itanium
Find out if your OS is 64-bit compliant »
Stata for Mac
- 32-bit Stata for any Mac running Mac OS X 10.5 or greater
(Universal binary for all processors including Intel and PowerPC.) - 64-bit Stata requires Intel-based Mac with a 64-bit processor and Mac OS X 10.5 or greater
Find out if your OS is 64-bit compliant »
Stata for Unix
- Linux: Any 32-bit (x86 or compatible) or 64-bit (Intel Itanium (x86-64 or compatible) running Linux
- IBM AIX:Any RS/6000 series running 64-bit IBM AIX
- Sun Solaris: Any 64-bit SPARC or compatible running Solaris 9 or higher (64-bit x86-64 Solaris version also available).
Hardware requirements
- Minimum of 512 MB of RAM
- Minimum of 80 MB of disk space
- Stata for Unix requires a video card that can display thousands of colours or more (16-bit or 24-bit colour)
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Prices
| Stata |
| Commercial | Click here to view | |
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| Academic | Click here to view | |
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To order Stata software, please contact our sales team either by email: info@timberlake.co.uk, phone: +44 (0)20 8697 3377 or fill out an online order form.
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Additional information
Upgrade information for recent Stata 11 purchases
Customers who purchased Stata 11 in April, May or June 2011 can take advantage of special concessions when upgrading to Stata 12.
If you completed your purchase within this period, we will be contacting you individually with full information on these concessions.
If you have any immediate questions, please do not hesitate to contact our sales desk by email: info@timberlake.co.uk or call: +44 (0)20 8697 3377.
Stata 12 release notes
Download the release notes for Stata 12 (PDF download via StataCorp)
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