SEMs

Parts of its extension of the current SEM commands, Stata 14 adds five new families to the command gsem: exponential, loglogistic, lognormal, Weibull and gamma with the ability to specify right-censoring and left-truncation allowing the user to estimate a range of new survival models. These models include multivariate models, survival models with unobserved components while also combining different survival models with each other.

A selected list of available outcomes and features in Stata 14 for SEM:

Available Outcomes		Available Features
New distributions for gsem permitting a broader range of outcomes: survival time and fractional responses/proportions		Satorra-Bentler adjusted model test
Multivariate survival models, survival models with unobserved components, survival models combined with other types of outcomes, fraction response models with unobserved components and fraction response models combined with other types of outcomes		Support for survey data
		Multilevel weights
		New predictions available

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