This paper provides a critical examination of the empirical basis of the output convergence debate in the light of recent developments in the analysis of dynamic heterogeneous panels with interactive effects. It shows that popular tools such as Barro's cross-country regressions and two-way fixed...

This paper by Blueprint Director Joshua Angrist, Alberto Abadie, Brigham Frandsen, and Jörn-Steffen Pischke surveys econometric innovations related to differences-in-differences estimators and to event-study models with time-varying treatment effects. The researchers discussion highlights...