Gross domestic product
Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a period of time, often annually 
GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP per capita at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
Consumer spending
Underlying tax manipulation as a stimulant or suppression of consumer spending is an equation for Gross Domestic Product (GDP). The equation is GDP = C + I + G + NX, where C is private consumption, I is private investment, G is government and NX is the net of exports minus imports. Increases in government spending create demand and economic expansion. However, government spending increases translates to tax increases or deficit spending. This creates a potential negative impact on private consumption, investment, and/or the balance of trade.