Induced consumption

Induced consumption is the portion of consumption that varies with disposable income. When a change in disposable income “induces” a change in consumption on goods and services, then that changed consumption is called “induced consumption”. In contrast, expenditures for autonomous consumption do not vary with income. For instance, expenditure on a consumable that is considered a normal good would be considered to be induced.

In the simple linear consumption function,

$$C = a + b \times Y_{d}$$

induced consumption is represented by the term $$b \times Y_{d}$$, where $$Y_{d}$$ denotes disposable income and $$b$$ is called the marginal propensity to consume.