# Relationship between income and autonomous consumption

### Autonomous consumption - Wikipedia

So as disposable income increases, consumption also increases but not as much . consumption = autonomous consumption + marginal propensity to consume In symbols, we write the consumption function as a relationship between. The alternative to autonomous consumption is induced consumption, which of economics, cause a change in the underlying consumption-income relation. The relationship between saving and income is called saving function. Clearly, at zero level of income, amount of autonomous consumption = Amount of.

Consumption increases as current income increases, and the larger the marginal propensity to consume, the more sensitive current spending is to current disposable income.

## Saving Function of Income: Meaning and Relationship between Saving and Income

The smaller the marginal propensity to consume, the stronger is the consumption-smoothing effect. We also assume that the marginal propensity to consume is less than one.

Goods market: Calculating the equilibrium income

This says that not all additional income is consumed. When a household receives more income, it consumes some and saves some. Here a represents autonomous consumption and b is the marginal propensity to consume. We assume three things about a and b: The second assumption means that the marginal propensity to consume is positive. By the third assumption, the marginal propensity to consume is less that one. What happens to the remainder of the increase in disposable income?

Since consumption plus saving is equal to disposable income, the increase in disposable income not consumed is saved. The slope of the consumption function b measures the change in consumption resulting from a change in income.

It is conceptually identified as induced consumption and the marginal propensity to consume MPC. Autonomous In A Line Consumption Line Another common way to identify autonomous consumption is with a standard consumption linesuch as the one presented in the exhibit to the right. This is reasonable because the consumption line is a graph of the consumption function. The red line, labeled C in the exhibit, is the positively-sloped consumption line for the equation: This line indicates that a minimum level of consumption expenditures are undertaken by the household sector even if income is zero.

For reference, a black degree line is also presented in this exhibit. Because the degree line has a slope of one, it indicates that the induced slope of the consumption line is less than one. The two primary characteristics of the consumption function--slope and intercept--are also identified by the consumption line.

Click the [Intercept] button to highlight.

Once again this intercept value is autonomous consumption. The slope of the consumption line presented here is positive, but less than one. In this case the slope is equal to 0.

### Saving Function of Income: Meaning and Relationship between Saving and Income

Click the [Slope] button to highlight. And once again this is induced consumption and the marginal propensity to consume MPC. Consumption Expenditures Determinants This is a good place to make note of factors other than income that also affect consumption expenditures.

While income is THE most important influence on consumption, interest rates, consumer confidence, and wealth are among other important influences--termed consumption expenditures determinants.

These determinants, similar to those for other relations in the study of economics, cause a change in the underlying consumption-income relation.

• Autonomous consumption

From a graphical perspective, these determinants cause the consumption line to shift, which effectively means that the intercept of this line changes. More generally, these determinants cause a change in autonomous consumption.