Consumption function

Consumption function is the relationship between income and expenditures on consumption.

Definition

According to Principles of Economics by Timothy Taylor (3rd edition),

Consumption function. The relationship between income and expenditures on consumption.

According to Macroeconomics by Mankiw (7th edition),

Consumption function. A relationship showing the determinants of consumption; for example, a relationship between consumption and disposable income, C � C(Y � T).