1. Suppose that minimum efficient scale for producing items with a 3-D printer is 100 times what a typical family would consume in a year. Would you expect each family to have its own 3-D printer?What sort of industry structure might arise?

2. Use the concepts of economies and diseconomies of scale to explain the shape of a firm's long-run ATC curve. What does "minimum efficient scale" mean? What bearing can the shape of the long-run ATC curve have on the structure of an industry?