What is Macroeconomics?

Macroeconomics is a branch of economics that studies a range of economic factors such as GDP, unemployment, growth rate, and inflation to find predictable patterns and trends in the economy as a whole and see if any factors are influenced by another. The concept of Macroeconomics was first started by John Maynard Keynes in 1936 with the publication of his book “General Theory of Employment, Interest and Money”.