Blockchain technology is transforming how markets work. Blockchains eliminate the need for trusted gatekeepers like banks to execute, verify, and record transactions. In the financial markets, their disruptive potential threatens Wall Street and Silicon Valley venture capitalists. How blockchain...

Bid rigging is quintessential criminal antitrust conduct. Yet search engine optimization experts publicly advise firms to agree with competitors not to bid on each other's trademarks in search engine keyword auctions, and evidence indicates that companies enter such bid-suppression agreements....

U.S. antitrust law empowers enforcers to review pending mergers that might undermine competition. But there is growing evidence that the merger-review regime is failing to perform its core procompetitive function. Industry concentration and the power of dominant firms are increasing across key...

The advent of mobile devices and digital media platforms in the past decade represents the biggest shock to cognition in human history. Robust medical evidence is emerging that digital media platforms are addictive and, when used in excess, harmful to users’ mental health. Other types of...

Predatory pricing is a strategy firms use to suppress competition. The predator prices below its own costs to force its rivals out of the market. After they exit, the predator raises its prices to supracompetitive levels and recoups the cost of predation. The Supreme Court has described...

The optimal duration of a supply contract balances the costs of re-selecting a supplier against the costs of being matched to an inefficient supplier when the contract lasts too long. I develop a structural model of contract duration that captures this tradeoff and provide an empirical strategy...

We show that, in general, consistent estimates of cost pass-through are not obtained from reduced-form regressions of price on cost. We derive a formal approximation for the bias that arises even under standard orthogonality conditions. We provide guidance on the conditions under which bias may...