Stata 14 is now available! Some of the exciting new features include:
- Bayesian analysis - Bayesian analysis is now available in Stata. You can fit a variety of Bayesian regression models by choosing from many built-in likelihood and prior combinations. You can also program your own models. Many postestimation features are available for checking convergence, for computing posterior mean estimates and credible intervals for model parameters and functions of model parameters, and more.
- Item response theory - IRT models are now available for binary, ordinal, and nominal data. Complementing model estimation is a suite of graphs for characteristic curves and information curves.
- Treatment-effect analysis - Treatment-effect analysis is now available for a much broader class of models. Endogenous treatment-effect estimation is now available for continuous, binary, count, and fractional outcomes. Treatment effects can now also be estimated from observational survival data. Other additions to treatment effects include the ability to apply probability weights and to check for balance between the treatment and control groups.
- You can fit a variety of multilevel survival models such as exponential and Weibull mixed-effects models.
- You can perform small-sample inference in linear mixed models using several denominator degrees-of-freedom methods, including the Kenward-Roger method.
- You can calculate power and sample size for epidemiological contingency table analyses.
- Stata now understands Unicode.
- You can conduct the Satorra-Bentler adjusted model test for SEMs with data that are not normally distributed.
- You can estimate models for rates, proportions, and other fractional responses using beta regression and fractional regression models.
- You can estimate Poisson models with censored dependent variables.
- Stata/MP now allows more than 2.1 billion observations – up to 20 billion observations given the current largest computer, and is ready for more once computer hardware catches up.
Find out more about Stata 14 features, pricing, licensing options and how to purchase or upgrade to Stata 14 here.