12.6

b. Suppose that the demand for stilts shifts outward to Q-2,428-50P. How would you now answer the questions posed in part (a)?

c. Because stilt-making entrepreneurs are the cause of the upward-sloping long-run supply curve in this problem, they will receive all rents generated as industry output expands. Calculate the increase in rents between parts

(a) and (b). Show that this value is identical to the change in long-run producer surplus as measured along the stilt supply curve. The handmade snuffbox industry is composed of 100 identical firms, each having short-run total costs given by and short-run marginal costs given by STC 0.5+10+5 = SMC=+10, where is the output of snuffboxes per day.

a. What is the short-run supply curve for each snuffbox maker? What is the short-run supply curve for the market as a whole?

b. Suppose the demand for total snuffbox production is given by Q=1,100-50P. What will be the equilibrium in this marketplace? What will each firm's total short-run profits be?

c. Graph the market equilibrium and compute total short-run producer surplus in this case.

d. Show that the total producer surplus you calculated in part

(c) is equal to total industry profits plus industry short-run fixed costs.

c. Suppose the government imposed a $3 tax on snuffboxes. How would this tax change the market equilibrium?

f. How would the burden of this tax be shared between snuffbox buyers and sellers? g. Calculate the total loss of producer surplus as a result of the taxation of snuffboxes. Show that this loss equals the change in total short-run profits in the snuffbox industry. Why don't fixed costs enter into this computation of the change in short-run producer surplus?