Y =
Output or income
K =
Capital
L =
Labor
F(K,L)=
The Production Function
A =
Total Factor Productivity (partly technology, partly institutions, partly…we don’t know)
y =
=Y/L=output per worker
k =
=K/L=capital per worker
MPK =
Marginal Product of Capital
MPL =
Marginal Product of Labor
P =
the average price level of output
R =
The Rental Price of Capital (i.e., the marginal factor cost of capital)
W =
The Wage Rate (i.e., the marginal factor cost of labor)
π =
(nominal) economic profit
Π =
=π/P=real economic profit
rc =
the real rental rate of capital (not the same as r, the real interest rate)
w =
the real wage rate
T =
Taxes
S =
National Saving
G =
Government Spending
C =
Consumption
I =
Investment
NX =
Net Exports