CPR Methods Seminar: Heterogeneous Treatment Effects and Negative Weights (Hugo Jales)

CPR Methods Seminar: "Heterogeneous Treatment Effects and Negative Weights: What's Going on in the Modern DiD Literature?" (Hugo Jales).

Difference-in-Differences is one of the most popular applied methods of causal evaluation. This seminar will provide an overview of the basic DiD setting and discuss recent developments in this literature. We will discuss the "negative weighting" issues that arise when one attempts to estimate DiD models using two-way fixed effects and discuss possible diagnostics and solutions.