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In the standard aggregate supply–aggregate demand model, real output (Y) is plotted on the horizontal axis and the price level (P) on the vertical axis. The levels of output and the price level are determined by the intersection of the aggregate supply curve with the downward-sloping aggregate demand curve.
The aggregate demand-aggregate supply model may be the most direct application of supply and demand to macroeconomics, but other macroeconomic models also use supply and demand. Compared to microeconomic uses of demand and supply, different (and more controversial) theoretical considerations apply to such macroeconomic counterparts as aggregate ...
A post-Keynesian theory of aggregate demand emphasizes the role of debt, which it considers a fundamental component of aggregate demand; [7] the contribution of change in debt to aggregate demand is referred to by some as the credit impulse. [8] Aggregate demand is spending, be it on consumption, investment, or other categories. Spending is ...
where W is the nominal wage rate (exogenous due to stickiness in the short run), P e is the anticipated (expected) price level, and Z 2 is a vector of exogenous variables that can affect the position of the labor demand curve. A horizontal aggregate supply curve (sometimes called a "Keynesian" aggregate supply curve) implies that the firm will ...
The importance of the term 'effective demand' to Keynesian Economics in general is shown in the fourth paragraph of the chapter, where he states that this concept of effective demand, i.e. the intersection of the supply and demand functions, is the "substance of the General Theory" and says that "the succeeding chapters will be largely occupied ...
This is in contrast to demand-side policies (e.g., higher government spending), which even if successful tend to create inflationary pressures (i.e., raise the aggregate price level) as the aggregate demand curve shifts outward. Infrastructure investment is an example of a policy that has both demand-side and supply-side elements. [4]
It contrasts with notional demand, which is the demand that occurs when purchasers are not constrained in any other market. In the aggregated market for goods in general, demand, notional or effective, is referred to as aggregate demand. The concept of effective supply parallels the concept of effective demand
Sonnenschein-Mantel-Debreu theorem (SMD theorem) is a theorem for exchange economy that can be expressed in the following way: . for a function that is continuous, homogeneous of degree zero, and in accord with Walras's law,there is an economy with at least as many agents as goods such that, for prices bounded away from zero, the function is the aggregate demand function for this economy.