Try to classify the following firms to one of the four market structure models.

Market Structure

Try to classify the following firms to one of the four market structure models. Explain your choice.

a. Rowena’s Gourmet Foods produces and sells a line of specialty foods)
b. Shasta Pool Company (swimming pool and spa building)
c. Merck (pharmaceuticals)
d. America West Airlines
e. UDC Homebuilders
f. Legal Seafoods (restaurant chain)