ECON10003 Lecture Notes - Lecture 4: Exogeny, Menu Cost, Real Interest Rate

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11 Oct 2018
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Reading: chapter 5 spending and output in the short run. 5. 1 an introduction to the keynesian model: key idea of keynes: decline in aggregate spending may cause output to fall below potential output, keynesian model provides explanation for how contractions and expansions might evolve over the short run. Short run: the period of time during which firms adjust their output to match prevailing level of demand without the price level having changes. Stabilisation policies: government policies that are used to affect planned aggregate expenditure, with the objective of eliminating output gaps. Menu costs: the costs of changing prices: ke(cid:455) assu(cid:373)ptio(cid:374) of ke(cid:455)(cid:374)esia(cid:374) (cid:373)odel: fi(cid:396)(cid:373)s do(cid:374)(cid:859)t (cid:396)espo(cid:374)d to e(cid:448)e(cid:396)(cid:455) (cid:272)ha(cid:374)ge i(cid:374) de(cid:373)a(cid:374)d for their products by changing prices. Instead, typically set a price for some period, then meet demand at that price (cid:858)(cid:373)eet de(cid:373)a(cid:374)d(cid:859) = fi(cid:396)(cid:373)s p(cid:396)odu(cid:272)e just e(cid:374)ough to satisf(cid:455) (cid:272)usto(cid:373)e(cid:396)s at p(cid:396)i(cid:272)e set: do(cid:374)(cid:859)t al(cid:449)a(cid:455)s (cid:272)ha(cid:374)ge p(cid:396)i(cid:272)es due to (cid:373)e(cid:374)u (cid:272)osts.

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