Medium run in Macroeconomics means the aggregate economic phenomena that covers periods of 10 to 25 years. All of the phenomenons in macroeconomics which cover this period range are known as medium range phenomenon like changes in the wage structure, changes in income per capita, and changes in growth patterns across OECD countries. Different phenomenons in macroeconomics can be categorized on the basis of time length like short run, medium run and long run. The phenomenons which are discussed for the period of 10 to 25 years are known as medium run in macroeconomics.