Investment Function In An Economy

Read this short article to learn about the importance, types, and determinants of investment function within an economy. Consumption depends upon the propensity to take, which, we’ve learnt, in more or less stable in the short time and is significantly less than unity. Greater reliance, therefore, needs to be positioned on the other constituent (investment) of income. From the two components (consumption and investment) of income, intake being stable, fluctuations in effective demand (income) are to be traced through fluctuations in investment.

Investment, thus, comes to play a strategic role in identifying the level of income, result and employment at the right time. We can establish the need for investment in another way also. I), consumption expenditures plus investment expenditures must equal the full total income (Y); but according to Psychological Law of Consumption given by Keynes, as income raises consumption boosts but by less than the increment in income also. This means that a part of the increment in income is not spent but saved.

The savings must be invested to bridge the difference between a rise in income and usage. If this difference is not plugged by a rise in investment expenditures, the effect would be an unintended upsurge in the stocks of goods (inventories), which in turn, would lead to mass and despair unemployment. Hence, investment rules the roost.

In Keynesian economics investment means real investment i.e., investment in the building of new machines, new stock buildings, roads, Bridges, and other types of productive capital stock of the community, including an increase in inventories. It generally does not include the purchase of existing shares, shares, and securities, which constitute simply an exchange of money from one person to another. This investment is merely financial investment and will not affect the level of employment in an economy. An investment is termed real investment only when it leads to an upsurge in the demand for human and physical resources, leading to an increase in their employment.

Investment is a circulation variable and its counterpart is a stock variable called capital. Investment may be private investment or public investment, it could be induced or autonomous. Induced investment is that investment which changes with a big change in income, that is why it is named income, elastic. In a free-enterprise capitalist economy, investments are induced by the profit motive.

Such investment is very attentive to changes in income, i.e., induced investment increases as income raises. The form of the induced investment curve, therefore, is upward sloping, indicating a rise in investment consequently of the rise in income. According to Hicks, the investment is of two types, induced as described above and autonomous- it is independent of variations in output. Autonomous investment is not sensitive to changes in income. Quite simply, it is impartial of income changes and it is not guided or induced by revenue motive only.

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Autonomous investments are made primarily by the Federal government and are not based on considerations of profit. Induced investment is performed specially to produce large output. The curve of autonomous investment is represented with a straight line running from left to right and parallel to the horizontal income axis. It is the gross investment, In the net investment and if the replacement investment also known as capital consumption. It’s the variations in the Where causes fluctuations in Y, A and E both in the short-run and in the long-run.

Or, it means that In is positive and the stock of capital is increasing add up to In thereby resulting in a rise in the capacity to produce. Ig, then I is negative and the stock of capital may decrease having unfavorable effects on the productive capacity. O and this mean that the economy is merely making good losing in capacity to create on account of obsolescence and depreciation. It might not be out of the spot to mention that online investment may also include expenditures on new durable consumer goods besides the costs on new capital goods.