Stata is a full-featured statistical software package with capabilities ranging from basic through advanced data management, analytical graphics, tables, tests, and statistical modeling. A graphical user interface and consistent command syntax make Stata relatively easy to learn. Beyond the interactive documentation (with quick help files but also thousands of pdf pages of manuals providing formulas, explanations, examples, and references), users can consult a library of paper or ebooks for more information about particular topics such as categorical dependent variables, structural equation modeling (SEM), multilevel modeling, econometrics, graphics, survival analysis, or programming. Stata’s built-in programming language, dedicated journal, and annual meetings support the development of original programs to accomplish specialized tasks or implement new statistical procedures. After providing the history of Stata, this entry reviews various ...