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.
State Domestic Product
State Domestic Product, or SDP, is the total value of goods and services produced during any financial year within the geographical boundaries of a "state". Also called the "state income", SDP is always calculated or estimated in monetary terms, and is instrumental in the evaluation of per capita income. "State" here refers to a country subdivision, as in the states of the United States and the states of India. While GDP gives a good estimate of the entire nation's output, SDP provides more detailed economic details about subnational territories.