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In microeconomics, the expenditure function gives the minimum amount of money an individual needs to spend to achieve some level of utility, given a utility function and the prices of the available goods. Formally, if there is a utility function that describes preferences over n commodities, the expenditure function
(Y − T + TR) is disposable income whereas (Y − T + TR − C) is private saving. Public saving, also known as the budget surplus, is the term (T − G − TR), which is government revenue through taxes, minus government expenditures on goods and services, minus transfers. Thus we have that private plus public saving equals investment.
GDP (Gross Domestic Product) is the value of all goods and services produced within a country during one year. GDP measures flows rather than stocks (example: the public deficit is a flow, measured per unit of time, while the government debt is a stock, an accumulation). GDP can be expressed equivalently in terms of production or the types of ...
Measures of GDP typically exclude unpaid economic activity, most importantly domestic work such as childcare. This leads to distortions; for example, a paid nanny's income contributes to GDP, but an unpaid parent's time spent caring for children will not, even though they are both carrying out the same economic activity.
For example, information on fossil fuel inputs to each sector can be used to investigate flows of embodied carbon within and between different economies. The structure of the input–output model has been incorporated into national accounting in many developed countries, and as such can be used to calculate important measures such as national GDP.
The other equation of disequilibrium, if S + T + M < I + G + X in the five sector model the levels of income, expenditure and output will greatly rise causing a boom in economic activity. As the households income increases there will be a higher opportunity to save therefore saving in the financial sector will increase, taxation for the higher ...
Thus the left side gives GDP by the income method, and the right side gives GDP by the expenditure method. The GDP is given on the bottom line of both sides of the report. GDP must have the same value on both sides of the account. This is because income and expenditure are defined in a way that forces them to be equal (see accounting identity ...
Real GDP can be used to calculate the GDP growth rate, which indicates how much a country's production has increased (or decreased, if the growth rate is negative) compared to the previous year, typically expressed as percentage change. The economic growth can be expressed as real GDP growth rate or real GDP per capita growth rate.