A bidding ring is a collection of bidders who collude in an auction in order to gain greater surplus by depressing competition. This entry describes some typical bidding rings and provides an introduction to the related theoretical and empirical literature.

Antidumping creates opportunities for abuse to stifle market competition. Whether cartels actually abuse trade policy for anticompetitive purposes remains an open question in the literature. To address this gap, we construct a novel dataset that matches cartel investigations with trade data at...