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Complementary Bidding and the Collusive Arrangement: Evidence from an Antitrust Investigation

By Robert Clark, Decio Coviello, and Adriano De Leverano

American Economic Journal: Microeconomics, May 2025

Clustered bids and a missing mass of nearly tied bids have both been proposed as markers of collusion. We present causal empirical evidence from an actual procurement cartel that bidding involves both clustering and a gap around the winning bid. We suppor...

Persistent Protests

By Sofia Correa

American Economic Journal: Microeconomics, May 2025

A continuum of citizens with heterogeneous opportunity costs participates in a protest with well-defined demands. As long as the government doesn't concede, it pays a cost increasing in time and participation. Citizens who are part of the victory team enj...

Severance Pay in an Optimal Contract

By Borys Grochulski, Russell Wong, and Yuzhe Zhang

American Economic Journal: Microeconomics, May 2025

We study the incentive role of severance compensation. In a canonical principal-agent model, we introduce exogenous job destruction risk and show that compensation following job destruction can reduce overall incentive costs. To mitigate the risk of ineff...

Price and Choose

By Federico Echenique and Matías Núñez

American Economic Journal: Microeconomics, May 2025

We describe a sequential mechanism that fully implements the set of efficient outcomes in environments with quasi-linear utilities. The mechanism asks agents to take turns in defining prices for each outcome, with a final player choosing an outcome for al...