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  • 學位論文

英國退出歐盟對英國與歐盟的經濟影響——基於GTAP模型的實證分析

Economic Impacts of Brexit on the UK and the EU — An Empirical Analysis Based on the GTAP Model

指導教授 : 林建甫
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摘要


英國已經正式啓動退出歐盟的程序,退出歐盟無疑會對英國與歐盟(注:本文中歐盟皆指除英國外的歐盟27國)的雙邊貿易産生衝擊,衝擊的幅度將取决於雙方可能達成的新貿易協定,特別是英國能否維持與歐盟現有的自由貿易。英國在退出歐盟後,勢必將與其他國家謀求新的貿易關係,如FTA(Free Trade Agreement,自由貿易協定),以彌補退歐給自己帶來的經濟損失。同時,歐盟對土耳其和EFTA(European Free Trade Association,歐洲自由貿易聯盟,由瑞士、挪威、冰島和列支敦斯登組成)在貿易上的影響力,可能會擴大英國的經濟損失。本文研究了英國退出歐盟、尤其是失去英-歐自由貿易,對英國和歐盟的經濟影響;同時也研究了英國與其他主要貿易國的FTA和歐盟對土耳其/EFTA的影響力,又會如何左右退歐所造成的不利影響。本文的實證研究採用了基於可計算一般均衡模型(Computable General Equilibrium Model,CGE Model)的全球貿易分析模型(Global Trade Analysis Project,GTAP)。 本文的實證結果顯示,退歐會給英國帶來較大的經濟損失,而歐盟的損失則較小。基準情境中,英國的損失是-1.290%~-2.957%,歐盟的損失是-0.114%~-0.262%,只有英國的8.8%~8.9%。在終止英-歐自由貿易后,英國與其他主要貿易國的FTA不能為英國彌補退歐損失:基準情境中,不同程度的FTA只能為英國彌補約31.8%~73.4%的退歐損失。相反,歐盟則能比較容易地通過與第三國的FTA,完全彌補退歐損失。 短期中,英國的資本收益率有較大幅度的下降,導致長期中英國資本外逃的程度比較高,從而進一步挫傷英國的經濟。英國與第三國的FTA能適當緩解英國的資本外逃問題。英國對外貨物運輸能力提高10%,並不會顯著影響基準情境中的結論。Arminton替代彈性的提高會顯著降低英國退歐的經濟損失。但是,即便Arminton替代彈性提高50%,也不足以使得英國通過與第三國的FTA完全彌補退歐損失。 終止英-歐自由貿易給歐盟和英國造成的邊際損失之比在各種情境及穩健性檢驗中都很小(7.9%~12.3%),這表明英國在英-歐自由貿易的談判中,完全處於不利的地位。本文建議英國政府在退歐談判中,在其他非核心問題上適當妥協,換取歐盟對英-歐自由貿易關係的維持,以减小退歐所帶來的經濟損失。

並列摘要


The United Kingdom has started the formal process of Brexit – the departure of the UK from the European Union. Brexit will have great impacts on the trade between the UK and the EU (the EU refers to the remaining 27 EU member states hereafter), the magnitude of which will depend on the possible new trade agreement between them, especially on whether the UK would remain the current free trade relation with the EU market. The UK will certainly seek new trade agreements, such as FTAs (Free Trade Agreement), with other countries to make up the loss due to Brexit. On the other hand, the influence of the EU on the trade policy of Turkey and the EFTA (European Free Trade Association, comprised of Iceland, Liechtenstein, Norway and Switzerland) may increase the UK’s loss from Brexit. This paper examines the possible economic impacts on the UK and the EU from Brexit, especially from the loss of the UK-EU free trade, and how these impacts will interact with the UK’s new FTAs with her other major trading partners and the influence of the EU on Turkey and the EFTA. The empirical analysis is conducted with the GTAP (Global Trade Analysis Project) model which is based on the CGE Model (Computable General Equilibrium Model). The empirical results show that the GDP loss of the UK from Brexit is large and substantial while that of the EU is relatively small. In the basic scenarios, the GDP losses of the UK are around 1.29%~2.96%, and those of the EU are around 0.11%~0.26%, only 8.8%~8.9% of those of the UK. The possible FTAs between the UK and her other major trading partners will only make up 31.8%~73.4%, not the total, of the losses due to Brexit depending on the scope of the FTAs. On the contrary, it is quite easy for the EU to make up her total GDP losses from Brexit by new FTAs with her other major trading partners. The rate of return of the capital in the UK drops substantially in the short run after Brexit, and this will result in capital flight out of the UK in the long run, which will make the UK’s economy even worse. The UK’s new FTAs will dampen the problem of the capital flight. It will not affect the major conclusion from the basic scenarios if the shipping technology between the UK and other countries improves by 10%. Although the GDP losses in the basic scenarios are quite sensitive to the Arminton elasticity of substitution assumed in the GTAP model, it is still not enough for the UK to make up her total GDP losses from Brexit by her new FTAs even if the Arminton elasticity of substitution increases by 50%. The ratio of the marginal losses between the EU and the UK from the termination of the free trade between the EU and the UK is as low as 7.9%~12.3% in all scenarios as well as the robust tests, which renders the UK an absolute unfavorable position in the negotiation for the UK-EU free trade after Brexit. This paper suggests that the UK government compromise on other non-core issues to secure free trade with the EU to dampen the economic shock from Brexit.

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