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This document examines income levels and consumption behavior under different constraints. Firstly, it explores scenarios without liquidity and credit constraints, analyzing intertemporal budget constraints and utility maximization strategies. It then shifts focus to situations with these constraints, discussing how they alter consumption patterns influenced by permanent and temporary income variations. Through graphical representations, the interactions between income levels and consumption are illustrated, offering insights into consumer behavior amidst varying economic conditions.
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GRAPHICALLY: INCOME LEVELS AND CONSUMTION ----- WITHOUT « LIQUIDITY CONSTRAINTS » OR « CREDIT/BORROWING CONSTRAINTS » C[1] Lw[1] Lw[0] C[0]
THE INTERTEMPORAL BUDGET CONSTRAINT C[1] Lw[1] 1+r Lw[0] C[0]
INTERTEMPORAL UTILITY MAXIMIZATION C[1] Lw[1] 1+r Lw[0] C[0]
C[1] Lw[1] C[1] 1+r C[0] Lw[0] C[0]
BORROWING FOR CURRENT CONSUMPTION C[1] Lw[1] REPAY C[1] BORROW 1+r C[0] Lw[0] C[0]
GRAPHICALLY: INCOME LEVELS AND CONSUMTION ----- WITH « LIQUIDITY CONSTRAINTS » OR « CREDIT/BORROWING CONSTRAINTS » C[1] Lw[1] Lw[0] C[0]
THE NEW INTERTEMPORAL BUDGET CONSTRAINT C[1] Lw[1] 1+r Lw[0] C[0]
INTERTEMPORAL UTILITY MAXIMIZATION WITH NEW BUDGET CONSTRAINT C[1] Lw[1] 1+r Lw[0] C[0]
INTERTEMPORAL UTILITY MAXIMIZATION C[1] Lw[1] 1+r Lw[0] C[0]
INCOME AND CONSUMPTION WITHOUT BORROWING CONSTRAINTS CONSUMPTION PERMANENT INCOME TEMPORARY INCOME INCOME
INCOME AND CONSUMPTION WITH BORROWING CONSTRAINTS CONSUMPTION TEMPORARY INCOME INCOME