總體經濟參數與政策搭配問題

Macroeconomic Parameters and the Assignment Problem

曹添旺(Tien-Wang Tsaur)；曹真睿(Jen-Ruey Tsaur)；林彥慶(Yen-Ching Lin)

政策搭配 ； 總體經濟參數 ； 動態穩定性 ； Assignment Problem ； Macroeconomic Parameters ； Dynamic Stability

經濟研究

55卷1期（2019 / 01 / 31）

115 - 146

繁體中文

鑑於Caves and Jones（1973）探討政府應如何運用匯率政策與財政政策來追求全面均衡的目標時，僅以內部均衡線與外部均衡線的相對斜率做為抉擇政策搭配的依據，Chen（1977）乃進一步闡明內部均衡線和外部均衡線的斜率孰大孰小端視邊際進口傾向是否小於1/2而定。準此，邊際進口傾向是否高於1/2，遂成為當局決定政策搭配方式的準則。本文修訂Chen（1977）隱含經濟體系始終處於充分就業的頑強設定，考量所得也會影響貿易收支後發現：邊際進口傾向與邊際儲蓄傾向的相對大小，才是政府選擇政策搭配的決定因素。具言之，若邊際進口傾向高（低）於邊際儲蓄傾向，則應以匯率政策維持內（外）部均衡，而以財政政策維持外（內）部均衡；相反的搭配會導致經濟體系的動態不安定。

Caves and Jones (1973) employ the Swan diagram to illustrate the assignment problem and suggest that the slope of the external-balance schedule being flatter than the internal-balance schedule implies higher relative effectiveness of exchange-rate (government expenditure) changes for securing an external (internal) balance. Chen (1977) further demonstrates that Caves and Jones' proposition is valid if and only if the size of the marginal propensity to import falls short of one half. This clear result of Chen (1977) comes from the robust assumption that the output is fixed at the full-employment level. This present research assumes that, unless the economy is lying on the internal-balance schedule, the output is capable of influencing the trade balance. We therefore show that the relative magnitude between the marginal propensity to import and the marginal propensity to save is crucial in determining the policy assignment. More specifically, if the size of the marginal propensity to import is smaller (larger) than the size of the marginal propensity to save, then an exchange-rate policy should be set up to secure the external (internal) balance and a proper fiscal policy should be executed to secure the internal (external) balance.

1. Beetsma, R. M. W. J.,Jensen, H.(2005).Monetary and Fiscal Policy Interactions in a Micro-Founded Model of a Monetary Union.Journal of International Economics,67(2),320-352.
2. Caves, R. E.,Frankel, J. A.,Jones, R. W.(2007).World Trade and Payments: An Introduction.Boston:Pearson.
3. Caves, R. E.,Jones, R. W.(1973).World Trade and Payments: An Introduction.Boston:Little, Brown and Company.
4. Chang, W. Y.,Lai, C. C.(2002).The Policy Assignment Principle with Wage Indexation.The American Economist,46(2),80-87.
5. Chen, C. N.(1977).Marginal Propensity to Import and the Assignment Problem.Taipei Economic Inquiry,20,75-77.
6. Chen, C. N.,Lai, C. C.,Chang, W. Y.(1987).The Tight Money Effect, Wage Indexation and Macroeconomic Policy: The Fleming Model Revisited.Journal of Economic Studies,14(5),54-62.
7. Davidson, P.(2016).Institute for New Economic Thinking Working PaperInstitute for New Economic Thinking Working Paper,未出版
8. Davig, T.,Leeper, E. M.(2011).Monetary-Fiscal Policy Interactions and Fiscal Stimulus.European Economic Review,55(2),211-227.
9. Dornbusch, R.(1976).Expectations and Exchange Rate Dynamics.Journal of Political Economy,84(6),1161-1176.
10. Ferrero, A.(2009).Fiscal and Monetary Rules for a Currency Union.Journal of International Economics,77(1),1-10.
11. Fleming, J. M.(1962).Domestic Financial Policies under Fixed and under Floating Exchange Rates.IMF Staff Papers,9(3),369-380.
12. Forlati, C.(2009).Center for Fiscal Policy, EPFL, Chair of International Finance (CFI) Working PaperCenter for Fiscal Policy, EPFL, Chair of International Finance (CFI) Working Paper,未出版
13. Frankel, J.(2005).NBER Working PaperNBER Working Paper,未出版
14. Frenkel, J. A.(1986).International Interdependence and the Constraints on Macroeconomic Policies.Weltwirtschaftliches Archiv,122(4),615-646.
15. Galí, J.,Monacelli, T.(2008).Optimal Monetary and Fiscal Policy in a Currency Union.Journal of International Economics,76(1),116-132.
16. Goldman Sachs(2008).Global Economics Weekly,08(07)
17. Greene, J. E.(2018).Macroeconomic Analysis and Policy: A Systematic Approach.Singapore:World Scientific.
18. Kirsanova, T.,Leith, C.,Wren-Lewis, S.(2009).Monetary and Fiscal Policy Interaction: The Current Consensus Assignment in the Light of Recent Developments.The Economic Journal,119(541),F482-F496.
19. Meade, J. E.(1951).The Balance of Payments.London:Oxford University Press.
20. Mundell, R. A.(1962).The Appropriate Use of Monetary and Fiscal Policy for Internal and External Stability.IMF Staff Papers,9(1),70-79.
21. Mundell, R. A.(1963).Capital Mobility and Stabilization Policy under Fixed and Flexible Exchange Rates.The Canadian Journal of Economics and Political Science,29(4),475-485.
22. Mundell, R. A.(1961).The International Disequilibrium System.Kyklos,14(2),153-172.
23. Mundell, R. A.(1960).The Monetary Dynamics of International Adjustment under Fixed and Flexible Exchange Rates.The Quarterly Journal of Economics,74(2),227-257.
24. NBER (2010), “US Business Cycle Expansions and Contractions,” http://www.nber.org/cycles.html
25. Temin, P,Vines, D.(2016).Institute for New Economic Thinking Working PaperInstitute for New Economic Thinking Working Paper,未出版
26. Tinbergen, J.(1952).On the Theory of Economic Policy.Amsterdam:North-Holland.
27. Turnovsky, S. J.(1977).Macroeconomic Analysis and Stabilization Policy.Cambridge:Cambridge University Press.
28. World Bank (2017), World Development Indicators, http://databank.worldbank.org/data/home.
29. 曹添旺, Tien-Wang(1975)。匯率政策與利率政策的搭配問題。臺北市銀月刊，6(1)，19-27。
30. 陳昭南, Chau-Nan(1972)。陳昭南 Chen, Chau-Nan (1972)，「國際金融理論的發展」 “The Development of International Finance Theories”，臺灣大學經濟研究所與行政院國際經濟合作發展委員會合辦經濟講習班講義Handout of Economic Workshop Organized by Department of Economics, National Taiwan University and Council for International Economic Cooperation and Development, Executive Yuan。(in Chinese)。
31. 廖培賢, Peir-Shyan(1998)。充分就業產出、國際收支平衡與政策搭配－ Chen, Lai and Chang 模型的一個應用。東海學報，39(5)，167-188。

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