Gross domestic product

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GDP growth during 'Recovery Summer'.

A country's annual gross domestic product (GDP) is the total dollar value of a nation's output, income, or expenditure produced within its physical boundaries regardless of by whom.[1] It is "gross" in the sense that it does not deduct depreciation of previously produced capital, in contrast to Net Domestic Product.

Calculating GDP

There are two primary methods for calculating GDP; the expenditure approach, and the income approach. The expenditure approach adds up spending by households, firms, the government, and the rest of the world using the following formula:

GDP = C + I + G + (XM)

Here C represents personal consumption expenditures by households, I represents investment in new capital, G represents government purchases, X represents exports, and M represent imports.

The income approach makes use of the fact that expenditures on GDP ultimately become income. National income can thus be modified slightly to arrive at GDP. To begin with, depreciation must be added to national income. Depreciation expenses are subtracted from corporate profits before the NI calculation, so they must be re-added to capture the value of output needed to replace or repair worn out buildings and machinery. Since indirect taxes (sales taxes, customs duties, license fees, and so on) are part of the expenditure on good and services (GDP) but they do not become income for suppliers of productive resources (NI), you have to add them back in. On the other hand, subsidy payments made by the government to farmers (for example) are part of the farmers' income but are not made in exchange for goods and services, so they are not part of GDP. Thus, they must be subtracted from NI to find GDP.

Finally, add the income of foreign workers in the country whose GDP is being calculated, and also subtract the income of citizens working abroad. This addition of the net income of foreign workers accounts for the fact that NI includes the income of all citizens everywhere whereas GDP includes the value of goods produced domestically by anyone. For example, if George Lucas makes a film in France, his income will be part of the U.S. national income because he is a U.S. citizen, but his foreign-made film is part of France's GDP. So one must subtract his income from NI when calculating the U.S> GDP. The opposite is true for citizens of France, for example, who produce in the U.S. The formula looks like this:

GDP=NI+Depreciation+Indirect~taxes-Subsidies+Net~income~of~foreigners

Net domestic product is GDP depreciation. This indicates how much output is left over for consumption and additions to the capital stock after replacing the capital used up in the production process.

See Also

References

  1. Glossary of Economic Terms (English) (HTML). International Information Programs (USINFO - The United States Department of State). Retrieved on 2007-08-21. “The total value of a nation's output, income, or expenditure produced within its physical boundaries.”
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