Consider an open economy in which goods market, money market, and labor market are all in equilibrium according to equations (i). (ii), (iii), and (iv) as follows: (i) S(Y,i) = 1(i)+X -m(Y) (00, I'(i)0) where S= saving, Y = national income, i = rate of interest, / = investment expenditure, m = expenditure on imports, and X = the value of exports (exogenously given). (ii) PL(Y,i) = MS ( Ly = OL/OY > 0 and L = OL/di O) (iv) pf (N) = W ("(N)