Macroeconomics.

Macroeconomics examines the economy as a whole "top down" to explain broad aggregates and their interactions. Such aggregates include national income and output, the unemployment rate, and price inflation and subaggregates like total consumption and investment spending and their components. It also studies effects of monetary policy and fiscal policy. Since at least the 1960s, macroeconomics has been characterized by further integration as to micro-based modeling of sectors, including rationality of players, efficient use of market information, and imperfect competition.[2] This has addressed a long-standing concern about inconsistent developments of the same subject.[3] Analysis also considers factors affecting the long-term level and growth of national income within a country and across countries.