Real GDP formula
Nominal GDP / GDP deflator x 100
GDP
C+I+G (X-M)
Real interest rate
Nominal interest rate - inflation rate
GNI
GDP + net factor income from abroad
Real GDP growth rate
(Real GDP in Y2 - Real GDP in Y1) / Real GDP in Y1
x 100
Current account balance
(Exports - imports) + net income + net current transfers
Income elasticity of demand
% Change in quantity demanded / % Change in income
Profit max point
MC = MR
Allocative efficiency
AR = MC