ECON 295 Lecture 3: Macro Lecture 3

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Macro lecture 3- chapter 21: the simplest short-run macro model. The national accounts divide actual gdp into its components: Two types of expenditures: autonomous expenditures do not depend on the level of national income. Induced expenditures do depend on the level of national income. Assumptions of the simplest short-run macro model: there is no trade with other countries, there is no government, the price level is constant. By simplifying the model we are better able to understand its structure and therefore how more complex versions of the model work. In the simplest theory, consumption is determined primarily by current disposable income (yd) Disposable income: is the amount of income households receive after deducting what they pay in taxes and adding what the receive in transfers. Two possible uses of disposable income: consumption (c) or saving (s) Key factors influencing desired consumption: disposable income, wealth. In more advanced theories individuals are forward looking, and so consumption depends on (cid:862)lifeti(cid:373)e(cid:863) i(cid:374)(cid:272)o(cid:373)e.

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