ECON1102 Lecture Notes - Lecture 6: Consumption Function, Unemployment, Output Gap
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Is falls slowly during an expansionary phase than it rises in a contraction. Industries which produce durable goods are more affected by expansions and contractions. Inflation follows a typical pattern during contractions and expansions. Aggregate expenditure & output in the keynesian model: 4 components of aggregate expenditure, consumption- household spending on final goods and services. In the short run, output = pae, and the keynesian model is in equilibrium. Injp= ip + g + x: wd= s + t + m, when pae > y, or injp > wd, planned aggregate expenditure is greater than output and an expansionary gap is created. In the short run, inventories would fall in order to meet demand. Eventually, stock would run out and firms would have to boost production, causing an expansion. If pae < y, or injp < wd, firms find themselves with unplanned inventories. Eventually they cut back on production, causing a contraction.
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