| Summary: | 碩士 === 國立政治大學 === 經濟研究所 === 95 === This study investigates the effects of national differences in intellectual property rights (IPRs) protection and the degree of threat of imitation on U.S. audio-visual products’ exports. Using panel data for the period 1997-2005, we not only apply a longitudinal IPRs index developed by World Economic Forum (WEF) and International Institute for Management Development (IMD) , but also employ the technique of generalized method of moments (GMM) on dynamic panel model to control for endogeneity problem. The empirical results show that the stronger IPRs increase U.S. audio-visual products’ exports. For the strong threat-of-imitation countries , the results are the same as Smith(1999)；but for the weak threat-of-imitation countries , the results seems to contradict with theory predictions.We think the reason that audio-visual products is easier to copy than the manufacturing goods in the literature, so they do not suit for the hypotheses before. Therefore, the firms can’t apply a high-price strategy because of a lot of competitors, and market power effect is not dominant.
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