EC140 Lecture Notes - Lecture 7: Consumption Function

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EC140 Full Course Notes
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Value added method avoids double counting of intermediate goods. By definition: expenditure = production = income. Investment: plant and equipment, residential structures, inventories. Payments to factors (wages, salaries, interest, business profits) Indirect taxes paid to government net of subsidies paid by government. Defines total planned spending in the economy at any level of income. Consumption function: autonomous and induced expenditure. Net exports: exports autonomous expenditure, imports induced expenditure. Consumption function: depends on wealth, interest rates, expectations. Net exports: exports foreign income, imports relative prices. In equilibrium expenditure = production = income -> ae = y. If desired aggregate expenditure is greater than production, firms increase production, and incomes decrease. If desired aggregate expenditure is less than production, firms decrease production, and income decreases. Ae = y corresponds to the 45 degree line. Changes to an element of desired aggregate expenditure change equilibrium income. Change in autonomous expenditure: increase in a leads to increase in y.

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