Respuesta :
The condition of a country's economy depends on its people's ability to exchange money for goods and services.
I believe the answer is: Economy
Economic growth in a country is measured with something called GDP (Gross Domestic Product) . GDP is calculated by counting all goods and services that produced by the nations in one year. Assuming that the market is in an equilibrium, the amount of GDP usually really close to people's purchasing power (ability to exchange money for goods and services.)