GDP is usually calculated one of three ways: consumption, production or income. In theory all three ways give you the same result. Unless noted, we mostly see the consumption method used in the press. GDP = C + G + I + NX (where C=consumption; G=government spending; I=Investment; and NX=net exports).GDP represents economic output. It's production measure only. It does not imply affluence of the population nor equality of distribution, though correlates somewhat with it. NYC metro has it so high because of all business headquarters but that money goes to a handful of CEO, Presidents, share-holders etc. not general population. That does not mean a waitress or shoemaker makes any more, especially when you will account for higher cost of living.
In the US consumption accounts for over 2/3 of the GDP. A trade surplus brings new money into the economy, making us richer as a nation (even if that new money is localized in specific places). As we have seen with the pandemic, when consumption takes a big hit, even a lot more government spending can't fix everything quickly.
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Consumption refers to private consumption expenditures or consumer spending. Consumers spend money to acquire goods and services, such as groceries and haircuts. Consumer spending is the biggest component of GDP, accounting for more than two-thirds of the U.S. GDP. Consumer confidence, therefore, has a very significant bearing on economic growth. A high confidence level indicates that consumers are willing to spend, while a low confidence level reflects uncertainty about the future and an unwillingness to spend.
Government spending represents government consumption expenditure and gross investment. Governments spend money on equipment, infrastructure, and payroll. Government spending may become more important relative to other components of a country's GDP when consumer spending and business investment both decline sharply. (This may occur in the wake of a recession, for example.)
Investment refers to private domestic investment or capital expenditures. Businesses spend money in order to invest in their business activities. For example, a business may buy machinery. Business investment is a critical component of GDP since it increases the productive capacity of an economy and boosts employment levels.
Net exports refers to a calculation that involves subtracting total exports from total imports (NX = Exports - Imports). The goods and services that an economy makes that are exported to other countries, less the imports that are purchased by domestic consumer, represents a country's net exports. All expenditures by companies located in a given country, even if they are foreign companies, are included in this calculation.
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