Creating a quantitative model of the economic system. Economic theory describes the economic system as a system of simultaneous equations. For example, if national income, interest rate, government spending, and money supply are Y , r , G , and M , respectively, and the consumption function, investment function, and money demand function are C ( Y ), I ( r ), and L ( r , Y ), respectively, Keynesian theory holds that national income and interest rate are determined as the solution to the simultaneous equations Y = C ( Y ) + I ( r ) + G , M = L ( r , Y ). This description of economic theory is only qualitative. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
経済システムの計量モデルを作ること。経済理論は,経済システムを連立方程式体系として記述する。たとえば国民所得,利子率,政府支出,貨幣供給量をそれぞれY,r,G,Mとし,消費関数,投資関数,貨幣需要関数をそれぞれC(Y),I(r),L(r,Y)で表すとき,ケインズ理論ではY=C(Y)+I(r)+G,M=L(r,Y)の連立方程式の解として国民所得,利子率が決まると考えられている。経済理論のこのような記述は定性的なものにすぎない。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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