Answer to Question #96294 in Microeconomics for Adekunle Okunade

Question #96294
Please attempt the following so as to assess your understanding on the application of optimization to real life economic problems.

Identify a cost or production problem and apply largrange optimisation technique to address the problem.
Expert's answer

Cost minimization is a necessary (but not sufficient) condition for profit maximization. Even when a producer is not a price taker in the output market, or when the solution to the profit maximization problem is not well defined (say, due to increasing returns), the producer must still minimize costs.

The producer chooses x1 and x2 (the choice variables) to minimize C(x1,x2) (the objective function)

minimize C(x1,x2) = w1 x1 + w2 x2

subject to the constraint

f(x1,x2) = y

The parameters of this problem are w1, w2, and y.

Form the Lagrangian function:

L = w1 x1 + w2 x2 + λ ( y - f(x1,x2) )

The variable λ is called the Lagrange multiplier for the constraint.

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