We build a model of tacit collusion between firms that operate in multiple markets to study the effects of trade costs. A key feature of the model is that cartel discipline is endogenous. Thus, markets that appear segmented are strategically linked via the incentive compatibility constraint....

We examine the setting of national competition policy in a two-country setting,emphasizing the relationship of trade to the goals of competition policy (suchas the degree and nature of competition). The issues we address involve thegeneral equilibrium distributional effects of competition...