Multidimensional heterogeneity and endogeneity are important features of models with multiple treatments. We consider a heterogeneous… Continue reading.

It is common to rank different categories by means of preferences that are revealed through data… Continue reading.

This paper studies linear panel regression models in which the unobserved error term is an unknown… Continue reading.

Vaccination has been perceived as a key to reaching “herd immunity” in the current COVID-19 pandemic…. Continue reading.