In this talk, I introduce Stata 12's new sem command for estimating the parameters of simultaneous-equations models. Some of the considered models include unobserved factors. Estimation methods include maximum likelihood and the generalized method of moments.

In this talk, I introduce new methods in Stata 12 for filtering and decomposing time series and I show how to implement them. I provide an underlying framework for understanding and comparing the different methods. I also present a framework for interpreting the parameters.