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The twin deficits hypothesis, also called the double deficit hypothesis or twin deficits anomaly, is a macroeconomic proposition that there is a strong link between a national economy's current account balance and its government budget balance.〔(FRBSF Economic Letter ''Understanding the Twin Deficits: New Approaches, New Results'' ), Michele Cavallo, July 22, 2005〕 ==Definition== Macroeconomic theory points to a link between the budget balance and the current account balance. This link can be seen from considering the National accounting model of the economy: where Y represents National Income or GDP, C is consumption, I is investment, G is government spending and X-M stands for net exports. This represents GDP because all the production in an economy (the left hand side of the equation) is used as consumption (C), investment (I), government spending (G), and goods that are exported in excess of imports (NX). Another equation defining GDP using alternative terms (which in theory results in the same value) is where Y is again GDP, C is consumption, S is savings, and T is taxes. This is because national income is also equal to output, and all individual income either goes to pay for consumption (C), to pay taxes (T), or becomes savings (S). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Twin deficits hypothesis」の詳細全文を読む スポンサード リンク
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