本研究探討各國智慧財產權保護和仿冒威脅程度的差異對美國影音軟體產品出口值的影響。資料為1997-2005年期間的panel data，分別採用由世界經濟論壇(WEF) 和瑞士洛桑國際管理學院（IMD)所發展之智財權指標，並以動態的GMM模型估計降低模型可能存在的內生性問題。實證結果在強仿冒威脅進口國方面，符合Smith(1999)的假說，亦即進口國智財權保護程度與美國影音軟體出口值成正比；但在弱仿冒威脅進口國方面，結果則與假說不符，產生與強仿冒威脅國家相同的結果。研究認為發生矛盾的原因是，影音軟體的仿冒過程遠較以往文獻研究的實體製造業產品容易得多，因此並不適用於之前的假設，再加上競爭者太多，導致廠商不敢大膽實施高價策略，使得市場獨占效果不顯著。

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.

ㄧ、中文部份
劉東發，（ 2003），「保安警察第二總隊專責警力查緝盜版光碟工作之研究」，中國文化大學政治學研究所碩士在職專班碩士論文
李昆峰，（2004），「專利保護與出口貿易 -台灣地區出口實證研究」，國立中央大學產經所碩士論文
梁惠芳，(2006)，「國內專利權保護對進口的影響：台灣高科技產業實證研究」，國立中正大學國經所碩士論文
二、英文部分
Anderson, J.E. (1979), A Theoretical Foundation of the Gravity Equation, American Economic Review, 69, 106-116.
Anderson, T.W. ＆ C. Hsiao (1982), Formulation and Estimation of Dynamic Models Using Panel Data, Journal of Econometrics, 18, 47-82.
Ahn, S.C. ＆ P. Schmidt (1995), Efficient Estimation of Models for Dynamic Panel Data, Journal of Econometrics, 68, 5-27.
Arellano, M. ＆ O. Bover (1995), Another Look at the Instrumental Variable Estimation of Error-Components Models, Journal of Econometrics, 68, 29-51.
Arellano, M. (1986), Panel Data econometrics, New York : Oxford University Press.
Bergstrand, J. (1985), The Gravity Equation in International Trade: Some Microeconomic Foundations and Empirical, Review of Economics and Statistics, 67, 474-81.
Deardorff, A.V. (1990), Welfare Effects of Global Patent Protection, Economica, 59, 33–51.
Egger, P. (2000), A Note on the Proper Econometric Specification of the Gravity Equation, Economics Letters, 66, 25-31.
Egger, P. (2002), An Econometric View on the Estimation of Gravity Models and the Calculation of Trade Potentials, The World Economy, 25, 297-312.
Ferrantino, M.J. (1993), The Effect of Intellectual Property Rights on International Trade and Investment, Weltwirtschaftliches Archiv, 129, 300-331.
Falvey , R., Foster, N. ＆ D. Greenaway (2006), Trade, Imitative Ability and Intellectual Property Rights, research paper, the University of
Nottingham.
Helpman, E. ＆ P. R. Krguman (1985), Market Structure and Foreign Trade, MIT Press, Cambridge, MA.
Hansen, B. E. (1996), Inference When a Nuisance Parameter Is Not Identified under the Null Hypothesis, Econometrica, 64, 413-430.
Hansen, B. E. (1999), Threshold Effects in Non-Dynamic Panels: Estimation, Testing and Inference, Journal of Econometrics, 93, 345-368.
Hansen,B.E. (2000), Sample Splitting and Threshold Estimation, Econometrica , 68, 575-603.
Im, K., Pesaran, H. ＆ Y. Shin (2003), Testing for Unit Roots in Heterogeneous Panels, Journal of Econometrics, 115, 53–74.
International Planning and Research Corporation, Sixth Annual BSA Global
Software -- Piracy Study , 2001.
Liu, W-H. ＆ Y-C. Lin (2005), Foreign Patent Rights and High-Tech Exports: Evidence from Taiwan, Applied Economics, 37, 1543-1555.
Mansfield, E. (1994), Intellectual Property Protection, Foreign Direct Investment, and Technology Transfer, International Finance Corporation Discussion Paper, 19.
Maskus, K.E., ＆ M. Penubarti (1995), How Trade-Related and Intellectual Property Rights, Journal of international economics, 39, 227-248.
Maskus, K., ＆ M. Penubarti (1998), How Trade-Related Are Intellectual Property Rights, Journal of International Economics, 39, 227-248.
Nasser Al-Mawali (2005), Bilateral Intra-Industry Trade Flows and Intellectual Property Rights Protection: First Empirical Evidence,
Applied Economics Letters, 12, 823–828.
Park, W.G. ＆ C. Ginarte (1997), Determinants of Patent Rights: Across-National Study , Research Policy, 26, 283-301.
Park, W.G. ＆ C. Ginarte (1997), Intellectual Property Rights and Economic Growth, Contemporary Economic Issues, 15, 51–61.
Rapp, Richard T. ＆ P. Rozek, Richard (1990), Benefits and Costs of Intellectual Property Protection in Countries, Journal of Would Trade, 24, 75-102.
Rafiquzzaman, M. (2002), The Impact of Patent Rights on International Trade: Evidence from Canada, Canadian Journal of Economics, 35, 307-330.
Smith P.J. (1999), Are Weak Patent Rights a Barrier to U.S. Exports, Journal of International Economics, 48, 151-177.
Smith P.J. (2001), How do Foreign Patents Rights Affect U.S. Exports, Affiliate Sales, and Licenses, Journal of International Economics, 55, 411-439.
Smith P.J. (2002), Patent Rights and Trade: Analysis of Biological Products, Medicinals and Botanicals, and Pharmaceuticals, American Journal of Agriculturl Economics , 84, 495-512.
Varian H.R.(2000), Buying, Sharing and Renting Information Goods, The Journal of Industrial Economics, 48 , 473-488.
Yang, C-H ＆ R-J. Woo (2006), Do Stronger Intellectual Property Rights Induce More Agricultural Trade: a dynamic panel data model applied to seed trade, Agricultural Economics, 35, 91–101.