Dundee Discussion Papers in Economics 174: Trade liberalisation, market structure and the incentive to merge

In this paper we consider whether a movement towards freer international trade generates incentives for firms to merge and if so what forms of merger are most profitable. In a linear Cournot framework we show that a reduction in trade costs may, but will not necessarily, encourage mergers. Both market structure and the level to which trade costs fall are shown to play a decisive role. Domestic mergers will be encouraged only if the product market is not highly concentrated and trade costs fall below a threshold level. International mergers can be encouraged in any market structure, and are generally more profitable than domestic mergers.