Body: Scholars who research "Economic theory" look at the abstract representation of the exchanges of goods and services between people.
Some motivations are understand what determines the wealth of a nation, understand how wealth is shared between social classes, understand how scarce resources are allocated in the economy.
Professionals of "Economic theory" include Milton Friedman, John Maynard Keynes, F.A Hayek, Joseph Stiglitz.
Microeconomics, macroeconomics, keynesianism, austrian economics.. are a few themes of "Economic theory".