Income and fertility
Gross domestic product (GDP) is the total dollar value of all goods an economy produces over a given time, usually expressed as a comparison to the previous quarter or year. If the year to year GDP is up 5 percent, then the economy has grown 5 percent. There are two approaches - the income approach (adding up all earnings over a year) and the expenditures approach (adding up what everyone spent). The income approach is described as the total employee compensation, gross profit for corporations and non-incorporated firms, and taxes minus subsidies. The expenditures method is more common and it specifically combines total consumption within households, and the total investment within a business. It also reveals how much money the government is spending and the balance of trade. Another factor by which is not promptly supportive are the youngsters who play a role within GDP. They clearly do not add to it and do not help the stock and bond market returns. Youngsters are wellsprings of advancement, entrepreneurial souls and play a major incentive to GDP.
List of countries by GDP (PPP)
GDP comparisons using PPP are arguably more useful than those using nominal GDP when assessing a nation's domestic market because PPP takes into account the relative cost of local goods, services and inflation rates of the country, rather than using international market exchange rates which may distort the real differences in per capita income. It is however limited when measuring financial flows between countries and when comparing quality of same goods among countries. PPP is often used to gauge global poverty thresholds and is used by the United Nations in constructing the human development index. These surveys such as the International Comparison Program include both tradable and non-tradable goods in an attempt to estimate a representative basket of all goods.