Welfare Effects of Tariffication on Parallel Trade

平行輸入商品關稅化之福利效果

10.6277/TER.2014.424.1

黃鴻(Hong Hwang)；黃品錚(Pin-Cheng Huang)；彭正浩(Cheng-Hau Peng)

關稅化 ； 平行輸入 ； 研發創新 ； 社會福利 ； tariffication ； parallel imports ； R&D ； social welfare

經濟論文叢刊

42卷4期（2014 / 12 / 01）

453 - 473

英文

關稅化是世界貿易組織（WTO）長期以來所提倡的政策，其目的在將非關稅貿易障礙轉換為關稅貿易障礙。本文以一個兩國模型探討進口國政府對平行輸入商品實施關稅化政策所產生之福利效果並進一步討論關稅化政策對於進口國製造商研發投入的影響。本文發現，無論製造商採取一部訂價或兩部訂價，關稅化政策都將使進口國福利下降。但關稅化對製造商研發投入的影響卻會因其訂價模式而有所不同。若製造商採兩部（一部）訂價法，關稅化政策將減少（不影響）其研發投入。此一結果顯示，若一國之製造商採兩部訂價法，且其政府對於平行輸入商品實施關稅化政策，長期而言將會導致該國福利惡化。

WTO has long called for converting non-tariff barriers into tariffs. This is called tariffication. Utilizing a two-country model, this paper examines the welfare effect of tariffication on parallel trade. We also compare the R&D levels of the manufacturer before and after tariffication. It is found that tariffication is socially undesirable for the domestic country no matter whether the manufacturer adopts one-part or two-part tariff pricing. But the effects of pricing on the manufacturer's R&D are very different. If the domestic manufacturer adopts two-part (one-part) tariff pricing, tariffication discourages (has no effect on) the R&D investment of the domestic manufacturer. This implies that domestic welfare worsens in the long run under two-part tariff pricing.

1. Kao, Kuo-Feng、Peng, Cheng-Hau(2009)。Optimal Trade Policy with Parallel Imports。Taiwan Economics Review，37，111-133。
   連結：
2. Ghimire, Hiramani and Ratnakar Adhikari (2001), “Agricultural Liberalisation and its Impact on South Asia,” Discussion Paper, SAWTEE
3. Chen, Yongmin,Maskus, Keith E.(2005).Vertical Pricing and Parallel Imports.Journal of International Trade and Economic Development,14,1-18.
4. Chiou, Jiunn-Rong,Hwang, Hong,Lin, Yan-Shu(2005).On the Equivalence of Tariffs and Quotas under a Revenue Constraint.Review of Development Economics,9,343-358.
5. Fung, K. C.(1989).Tariffs, Quotas and International Oligopoly.Oxford Economic Papers,41,749-757.
6. Ganslandt, Mattias,Maskus, Keith E.(2004).Parallel Imports and the Pricing of Pharmaceutical Products: Evidence from the European Union.Journal of Health Economics,23,1035-1058.
7. Hwang, Hong,Kao, Kuo-Feng,Peng, Cheng-Hau(2011).Tariff and Quota Equivalence in Vertically Related Markets.Review of Development Economics,15,19-32.
8. Hwang, Hong,Peng, Cheng-Hau,Shih, Pei-Cyuan(2014).Parallel Imports, Product Innovation and Market Structure.International Review of Economics and Finance
9. Hwang, Hong,Peng, Cheng-Hau,Wu, Hsiu-Ling(2013).Tariffication and Welfare in a Differentiated Duopoly.World Economy,36,899-911.
10. Ingco, Merlinda D.(1996).Tariffication in the Uruguay Round: How Much Liberalisation?.World Economy,19,425-446.
11. Jørgensen, Jan G.,Schröder, Philipp J. H.(2007).Effects of Tariffication: Tariffs and Quotas Under Monopolistic Competition.Open Economies Review,18,479-498.
12. Lee, Tae Jeong,Lee, Insung(2009).Retaining the Quota System in the South Korean Rice Market.Journal of Contemporary Asia,39,440-462.
13. Li, Changying(2006).Competition, Parallel Imports and Cost-Reducing Innovation.Scottish Journal of Political Economy,53,377-397.
14. Li, Changying,Maskus, Keith E.(2006).The Impact of Parallel Imports on Investment in Cost-Reducing Research and Development.Journal of International Economics,68,443-455.
15. Maskus, Keith E.,Chen, Yongmin(2004).Vertical Price Control and Parallel Imports: Theory and Evidence.Review of International Economics,12,551-570.
16. Matschke, Xenia(2003).Tariff and Quota Equivalence in the Presence of Asymmetric Information.Journal of International Economics,61,209-223.
17. Matteucci, Giorgio,Reverberi, Pierfrancesco(2014).Parallel Trade, Product Quality, andWelfare.Economics Letters,122,258-262.
18. Mueller-Langer, Frank(2012).Parallel Trade and Its Ambiguous Effects on Global Welfare.Review of International Economics,20,177-185.
19. Swinbank, Alan(2004).Dirty Tariffication Revisited: The EU and Sugar.Estey Centre Journal of International Law and Trade Policy,5,56-69.
20. Yang, Min-Hsien(1997)。Evaluation of the Dynamic Effects of Rice Import Policy and Subsides on Taiwan Rice Industry。Taiwan Agriculture Economic Review，3，25-68。