?Hair Pins /hourBandanas /hourNigel410Mia93Consider two individuals, Nigel and Mia, who produce hair pins and bandanas. Nigel's and Mia's hourly productivity are shown in Table 3.3. Nigel's opportunity cost of producing one hair pin is:

Growth in real GDP per capita has:

A. slowed since the mid-nineteenth century compared to before. B. been steady over the course of human history. C. increased over the last 150 years only in the United States and Canada. D. been more rapid since the mid-nineteenth century than ever before.

A curve showing the amount of real output we collectively wish to purchase at various alternative price levels is called the ___________.

Fill in the blank(s) with the appropriate word(s).