We develop the case of two-stage least squares estimation (2SLS) in the general framework of Athey et al. (Generalized Random Forests, Annals of Statistics, Vol. 47, 2019) and provide a software implementation for R and C++. We use the method to revisit the classic application of instrumental...

Using quarterly data of 58 countries, this paper provides empirical evidence that mobile phone diffusion from 2007 to 2009 is positively influenced by international network effects. Direct and indirect network effects are a result of the international standadization of telecommunication...

This paper studies the effects of differences in worldviews on parents? attitudes towards their children. We use unique German survey data containing questions on worldviews, religion, parental behavior, and socioeconomic variables. Our empirical evidence suggests that people with stronger...