GDP(O), GDP(E), GDP(I) (Economic Glossary)

GDP(O), GDP(E), GDP(I) : These are 3 different methods of calculating gross domestic product (GDP) – a measure of economic activity. In theory, these 3 measures should equal each other. GDP(O) is the sum of all production activity with the economy (the output approach), as estimated using gross value added (GVA). GDP(E) is the sum of all final expenditures by the economy (the expenditure approach). GDP(I) is the sum of all income generated by production within the economy (the income approach).