Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This study examines mergers in two-sided markets using a structural supply-and-demand model that employs data from the 1996-2006 merger wave in the U.S. radio industry. In particular, it identities the conflicting incentives for merged firms to exercise market power on both listener and advertiser sides of the market, and disaggregates the effects of mergers into changes in product variety and advertising quantity. Specifically, it finds 0.2% listener welfare increase (+0.3% from increased product variety, and -0.1% from decreased ad quantity) and 21% advertiser welfare decrease (-17% from changes in product variety, and -5% from decreased ad quantity).