NAFTA as a means of raising rivals' costs

The North American Free Trade Agreement (NAFTA) was designed to reduce tariff rates between Mexico, Canada and the U.S.A over a period of ten years. However, lower tariff rates are only available to firms that comply with complicated and costly NAFTA filing regulations. Such regulations raise costs of small firms relative to large firms in a domestic industry which engages in trade between NAFTA countries. This implication of NAFTA regulations can lead to increased concentration in domestic industries, an hypothesis which can be tested as the transition period comes to an end. Finally, our model suggests an explanation for why the levels of trade from the U.S.A. to Mexico have been lower than general expectations.