Marco economics is that part of economics where we study economy in its totality .i.e we study aggregate economic variables of an economy like income , consumption , unemployment etc.
It deals with developing various models explaining relationships between different macro economic variables such as national output , aggregate demand , aggregate supply, price level etc.
It sees an economy as a combination of four sectors namely households , firms , government and external sector and examines various interlinkages that may exist between these sectors.
It deals with studying determinants of long run economic growth as well as causes for short term fluctuations that constitute the business cycle.
It is also concerned with analysing various monetary and fiscal policies and aids govt to form appropriate economic policies.