March 17, 2018 

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SHORT-RUN AGGREGATE SUPPLY CURVE: A graphical representation of the short-run relation between real production and the price level, holding all ceteris paribus aggregate supply determinants constant. The short-run aggregate supply, or SRAS, curve is one of two curves that graphical capture the supply-side of the aggregate market; the other is the long-run aggregate supply curve (LRAS). The demand-side of the aggregate market is occupied by the aggregate demand curve. The positive slope of the SRAS curve captures the direct relation between real production and the price level that exists in the short run.

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PHYSICAL FLOW: In the circular flow, the counter-clockwise transfer of goods and services from the business sector to the household sector and the transfer of resource services from the household sector to the business sector. The payment flow moves in the opposite direction. The physical flow, the physical movement of goods and services, is the foundation of the economy's circular flow. The fundamental problem of scarcity is addressed by physically transforming scarce resources into goods and services that are then used to satisfy wants and needs.

     See also | circular flow | payment flow | goods | services | business sector | household sector | product markets | factor markets | consumption | gross domestic product | factor payments | national income |

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The proportion of each additional dollar of household income that is used for consumption expenditures. The marginal propensity to consume (abbreviated MPC) is another term for the slope of the consumption line and is calculated as the change in consumption divided by the change in income. The MPC plays a central role in Keynesian economics. It quantifies the consumption-income relation and the fundamental psychological law. It is also a foundation for the slope of the aggregate expenditures line and is critical to the multiplier process. A related consumption measure is the average propensity to consume.

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