Consumption And Investment Functions
Introduction
In the second chapter we have seen the concept of national income,
its measurement, importance and difficulties. The present chapter deals with
consumption function and the investment function which play a vital role in
influencing national income.
The primary macroeconomic objective is acceleration of growth of
national income. We have already seen that national income comprises of
consumption goods (C) and investment goods. There is close correlation between
investment and national income. The multiplier refers to the change in national
income resulting from change in investment. The value of multiplier itself
depends on consumption function or marginal propensity to consume. The
consumption function is the relationship between consumption expenditure and
the national income. The unspent portion of national income is called saving
which becomes investment and thereby capital. The relationship between
consumption expenditure and the capital expenditure is explained by the
principle of accelerator. All these variables are closely interconnected.
In this chapter one can learn the consumption function,
psychological law of consumption, investment function, multiplier, accelerator
and super multiplier.
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