Imports,monopoly power,profits and exchange rates

This study uses pooled data on U.S. manufacturing industries and on U.S. imports to analyze the level of monopoly power and the restraining influence of the import penetration ratio at the industry level. In general, industries with higher levels of imports have lower levels of monopoly power. In addition, imports have a greater impact on industries with more monopoly power (i.e., higher concentration), even though the level of imports may be lower. Finally, the impact of imports on monopoly power appears to be increasing over time indicating that U.S. manufacturing has become significantly more competitive over the 1961 to 1984 period. (JEL F14, L12)