Stata statistical software is a general-purpose system intended for use by medical researchers, biostatisticians, epidemiologists, economists, sociologists, political scientists, geographers, psychologists, social scientists, and other research professionals. It is available for Windows, Macintosh, and Unix computers and provides full data management, graphics, statistical, and matrix language capabilities. In addition to general-purpose capabilities such as summary statistics, ANOVA, linear, logistic, and probit regression, and the like, Stata provides survival analysis including Kaplan-Meier survivor function estimates, Cox proportional hazards models, survey analysis, time series, multivariate analysis, and panel data estimators including random-effects, fixed-effects, and multilevel mixed-effects for continuous, binary, and count outcomes.
What's new in this version: Stata 11 adds many new features such as multiple imputation, factor variables, generalized method of moments (GMM), competing-risks regression, state-space modeling, predictive margins, a Variables Manager, and more.