This paper develops a mathematical model of innovation in technology with two main characteristics. First, it discusses the endogenously made decision on not only how much to innovate, but also, how much to imitate. Second, it demonstrates that the decision to innovate or imitate are not...

This paper develops a strategy with simple implementation and limited data requirements to identify spatial distortion of supply from demand – or, equivalently, unequal access to supply among regions – in transportation markets. We apply our method to ride-level, multi-platform data from New...

Reclassification risk is a major concern in health insurance where contracts are typically one year in length but health shocks often persist for much longer. We use rich individual-level medical information from the Utah all-payer claims database to empirically study one possible solution:...