“...Firms and workers may sign complex contracts that govern many aspects of their interactions. I show that when firms regard contracts as substitutes, bargaining...”

“...When asked to name one proposition in the social sciences that is both true and non-trivial, Paul Samuelson famously replied: 'Ricardo's theory of comparative...”

“...How did the diffusion of the internet affect regional wage inequality? We examine the relationship between business investment in advanced internet technology...”