Public policy 

 
Public policy researchers have relied on Stata for over 30 years because of its breadth, accuracy, extensibility, and reproducibility. Whether you are researching trade, international development, defense, health, energy/environment, education, law, or urban planning, Stata provides all the statistics, graphics, and data-management tools for you.



Features for public policy analysts:

Treatment effects
Estimate treatment effects for continuous, binary, count, and survival outcomes and for multilevel and multivalued treatments. Obtain estimates of effects under endogeneity. Choose from inverse probability weights (IPW), propensity-score matching, covariate matching, regression adjustment, doubly-robust augmented IPW and IPW with regression adjustment models. And more.

 

Structural equation models
Construct models for continuous, binary, count, ordinal, multinomial, or survival outcomes and incorporate unobserved components at any level. Specify weights at each level of the model. Use with complex survey data. And more.

 

Multilevel mixed models
Obtain descriptive statistics, parameter estimates, and predictions for hierarchical, nested, and clustered data with unobserved random effects and random coefficients.

 

Panel data
Obtain descriptive statistics and estimates for linear, nonlinear, and dynamic panel-data models. Get access to instrumental-variables random-effects, fixed-effects, and population-averaged estimates. Build your own dynamic model or use traditional models like Arellano–Bond. Fit models for binary, count, and continuous outcomes. And more.

 

Contrasts, pairwise comparisons, and margins
Use estimation results to obtain estimates and graphs of interactions, average effects, partial effects, contrasts, and pairwise comparisions. Draw profile and interactions plots. And more.

 

Cross-sectional models
Estimate linear regression, quantile regression, truncated and censored regression, ordered, multivariate, binary, fractional, and count maximum-likelihood models. And more. 

 

Instrumental variables and Selection
Fit cross-sectional and panel-data models under endogeneity and with selection. Use estimators for selection and endogeneity for binary, count, and continuous outcomes. And more.

 

Survival analysis
Perform survival-data analysis for your descriptive statistics, Cox proportional hazards model, linear regression models, structural equation models, binary response models, discrete response models, instrumental-variables models, and regressions models with selection. And more. 

 

Multiple imputation
Use descriptive statistics such as means, proportions, and ratios, and fit linear and nonlinear regressions, multilevel mixed-effects models, panel-data models, survival models, and much more using multiple imputation to account for missing data in your sample.

 

Bayesian analysis
Fit Bayesian regression models using a Metropolis–Hastings Markov chain Monte Carlo (MCMC) method. Choose from a variety of supported models or program your own. Check convergence visually using extensive graphical tools. Compute posterior mean estimates and credible intervals for model parameters and functions of model parameters. Perform interval and model-based hypothesis testing. Compare models using Bayes factors.

 

Mata
Program your own estimator using Stata's built-in matrix language, MATA. Use MATA interactively with Stata. Obtain inversions, decompositions, eigenvalues and eigenvectors, and numerical derivatives. Use LAPACK routines, real and complex numbers, string matrices, and object-oriented programming. And more.