Data-driven learning uncontroversially plays a role in human language acquisition--how large a role is a matter of much debate. The success of artificial neural networks in NLP in recent years calls for a re-evaluation of our understanding of the possibilities for learning grammar from data alone. This dissertation argues the case for using…

This dissertation includes three essays in the field of economics of education. The first essay estimates the effect of top school management on student achievement in America. I use newly-collected data on the tenures of school district superintendents--the highest-ranking executive in U.S. school districts--to estimate the impact of individual…

Complaining is a fundamental human characteristic that has prevailed throughout the ages. We normally complain about something that went wrong. Patient complaints are no exception; they focus on problems that occurred during the episode of care. The Institute of Medicine estimated that each year thousands of patients die due to medical errors. The…