7. Product & Cost Curves: Numerical Cobb-Douglas Case > Continue with the general functions from the previous two problems, specifying particular values for input prices w and r and also for the fixed quantity of K, Ko. > Production and cost functions are: Q(L, K) = LK½ C(L, K) = wL + rK > Let input prices be: w = r = 1 Thus total cost is: C(L, K) = L + K a. Write the long run total, average, and marginal cost equations, which are functions of Q (see Problems 4d and 6a): LTC = C = LAC = C/Q = LMC = &C/GQ = b. Suppose that K is fixed in the short run at Ko = 1. Using your earlier results and the fact that Q = TPL, calculate these functions of the variable input L: %3D TPL = %3D APL = = Q/L = MPL = 8Q/8L = c. Write the short run cost functions (see 6b) with input K fixed at Ko = 1: FC = AFC = VC = AVC = TC = SAC = MC = %3D %3D

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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Could I have help deriving these equations
9.
7.
Product & Cost Curves: Numerical Cobb-Douglas Case
> Continue with the general functions from the previous two problems, specifying
particular values for input prices w and r and also for the fixed quantity of K, Ko.
> Production and cost functions are:
Q(L, K) = L½K½
C(L, K) = wL + rK
> Let input prices be: w = r = 1
Thus total cost is: C(L, K) = L + K
a. Write the long run total, average, and marginal cost equations, which are
functions of Q (see Problems 4d and 6a):
LTC = C =
and Econom
LAC = C/Q =
LMC = dC/GQ =
b. Suppose that K is fixed in the short run at Ko = 1. Using your earlier results and
the fact that Q = TPL, calculate these functions of the variable input L:
TPL =
APL = Q/L =
ehat
MPL = ÖQ/ÖL =
c. Write the short run cost functions (see 6b) with input K fixed at Ko = 1:
FC =
fthe r
AFC =
VC =
AVC =
TC =
SAC =
MC =
Transcribed Image Text:9. 7. Product & Cost Curves: Numerical Cobb-Douglas Case > Continue with the general functions from the previous two problems, specifying particular values for input prices w and r and also for the fixed quantity of K, Ko. > Production and cost functions are: Q(L, K) = L½K½ C(L, K) = wL + rK > Let input prices be: w = r = 1 Thus total cost is: C(L, K) = L + K a. Write the long run total, average, and marginal cost equations, which are functions of Q (see Problems 4d and 6a): LTC = C = and Econom LAC = C/Q = LMC = dC/GQ = b. Suppose that K is fixed in the short run at Ko = 1. Using your earlier results and the fact that Q = TPL, calculate these functions of the variable input L: TPL = APL = Q/L = ehat MPL = ÖQ/ÖL = c. Write the short run cost functions (see 6b) with input K fixed at Ko = 1: FC = fthe r AFC = VC = AVC = TC = SAC = MC =
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