Assignment
Suppose a monopoly must decide on a level of R&D along with production levels. R&D is expensive initially, but lowers the marginal cost of production. Suppose the firm faces costs C(q,r) = ar^2 + (c-r)q, and must decide on a level of R&D expenditure and how much of the good to produce, q. Inverse demand is given by p(q) = a-bq.
(a) What is the firm's objective function?
(b) What are the firm's first-order conditions?
(c) What are the optimal q? and r??
(d) Under what levels of does the firm invest in R&D?