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Stata is general-purpose statistical software. Currently in version 11, Stata is known for its wide range of statistical routines, ease of data management, and publication-quality graphics. Stata is available on virtually all computing platforms, including Windows, Macintosh, and most varieties of Unix/Linux. It is designed to run on both 32-bit and 64-bit architectures and operating systems. Stata possesses both a command-line interface and a point-and-click menu interface, with a one-to-one correspondence between the two. Stata appeals to researchers from a wide range of fields, with concentrations in the health sciences and in economics. Statistically, Stata strengths are in the areas of panel/longitudinal data, survival analysis, and the analysis of data from complex surveys. Users can program their own routines using a mixture of Stata's own interpretive language and the compiled matrix-programming language Mata, included with all Stata installations. Stata is offered in three flavors: Stata/IC, a standard version adequate for most purposes; Stata/SE, an expanded version for use with larger (wider) datasets; and Stata/MP, a version with specialized code designed to make use of multiple cores/processors and run faster on systems that have them. WIREs Comp Stat 2010 2 728–733 DOI: 10.1002/wics.116

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