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(Production function) Condsider a representitive firm with a production function which is (i) twice continuously differentiable; (ii) exhibits positive and diminishing marginal product and (ii) has constant return to scale: Y = F(K, L) Given the capital rental price R and the wage w, and the good price P is normalized to 1, the firm can choose K and L to maximize its profit: max F(K, L) - RK - wL K,L3. (Solow Model) Denote that Y F(K, L) L1)-f(k) (a) Again the firm would like to optimize its profits (equation (2)), and the production function F satisfies assumption (i)-(iii) in question 1. Show that the wage and the capital rental price can be written as R = f (k) w- f(k) - kf(k) (b) Assume that the labor grows exponentially: Lt = L0ent (10) Show that the growth rate of k equals the growth rate of K minus n: (c) Suppose that the saving rate is s, and the depreciation rate of capital is δ, given the fact that (12) Then show that the growth rate of k can be written as (13) (d) What is the steady state of kt in this economy?

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