Quoc: Macroeconomics (from the Greek prefix makro-meaning "large" and economics) is a branch of economics dealing with the performance, structure, behavior, and decision-making of an economy as a whole. This includes national, regional, and global economies. Macroeconomics and microeconomics, a pair of terms coined by Ragnar Frisch, are the two most general fields in economics. In contrast to macroeconomics, microeconomics is the branch of economics that studies the behavior of individuals and firms in making decisions and the interactions among these individuals and firms in narrowly-defined markets.

Answer this question based on the passage: who gave concept of micro and macro economics?
HW Chung: OK, some thoughts:
To answer the above question, the relevant sentence is: Macroeconomics and microeconomics, a pair of terms coined by Ragnar Frisch, are the two most general fields in economics. The answer is Ragnar Frisch.