# Welcome to grmpy’s documentation!¶

grmpy is an open-source Python package for the simulation and estimation of the generalized Roy model. It serves as a teaching tool to promote the conceptual framework of the generalized Roy model, illustrate a variety of issues in the econometrics of policy evaluation, and showcase basic software engineering practices.

We build on the following main references:

James J. Heckman and Edward J. Vytlacil. Econometric evaluation of social programs, part I: Causal models, structural models and econometric policy evaluation. In Handbook of Econometrics, volume 6B, chapter 70, pages 4779–4874. Elsevier Science, 2007.

James J. Heckman and Edward J. Vytlacil. Econometric evaluation of social programs, part II: Using the marginal treatment effect to organize alternative econometric estimators to evaluate social programs, and to forecast their effects in new environments. In Handbook of Econometrics, volume 6B, chapter 71, pages 4875–5143. Elsevier Science, 2007.

Contents: