Data management
Data transformations, match-merge, by-group processing, time and date variables, XML, sort, ODBC, outer joins, reshaping, labeling, FDA NDA format, string functions, more
Graphics
Line charts, scatterplots, bar charts, pie charts, hi?lo charts, regression diagnostic graphs, survival plots, nonparametric smoothers, distribution plots, overlaid plots, interactive graph editor, combined graphs, more
Basic statistics
Summaries, cross-tabulations, correlations, t tests, equality-of-variance tests, tests of proportions, confidence intervals, more
Linear models
Regression, multilevel mixed models with random coefficients, robust Huber/White/sandwich standard errors, instrumental variables (2SLS, LIML, GMM), 3SLS, seemingly unrelated regression, constrained regression, quantile regression, GLS, more
ANOVA/MANOVA
Balanced and unbalanced designs; factorial, nested, and mixed designs; repeated measures; more
Time series
ARIMA, ARMAX, ARCH/GARCH, VARs and structural VARs, cointegrated VECMs, IRF and dynamic multiplier analysis, Newey?West standard errors, correlograms, periodograms, white-noise tests, unit-root tests, smoothers, more
Survival analysis
Kaplan?Meier, Nelson?Aalen, Cox regression with frailty, parametric models with frailty, sample size calculations, tests of proportional hazards, time-varying covariates, left and right censoring, Weibull, exponential, Gompertz, lognormal, log-logistic, gamma, more
Longitudinal/panel data
Random-and fixed-effects regression; random-effects probit; GEE; random and fixed-effects Poisson and negative binomial; random-effects tobit; dynamic panel-data models; instrumental variables regression; regression with AR(1) disturbances; more
Multilevel mixed-effects models
Continuous, binary, and count outcomes; random coefficients and intercepts; predicted effects; more