4 papers
Demand Curvature and Pass-Through in Differentiated Oligopoly
Paul S. Koh
This paper studies cost pass-through in differentiated-product oligopoly. I derive a general representation of the pass-through matrix that decomposes equilibrium price responses i…
Antitrust on Aisle Five: How Well Do Divestiture Remedies Work?
Xiao Dong, Paul Koh, Devesh Raval +2
Antitrust authorities frequently rely on structural divestitures to address competitive concerns raised by mergers. Using census-level establishment data and proprietary transactio…
Concentration-Based Inference for Evaluating Horizontal Mergers
Paul S. Koh
Antitrust authorities routinely rely on market concentration measures to assess the potential adverse effects of mergers on consumer welfare. Using a first-order approximation argu…
Market Definition: A Sensitivity Analysis
Paul S. Koh
Market definition holds significant importance in antitrust cases, yet achieving consensus on the correct approach remains elusive. As a result, analysts routinely entertain multip…