1. What are the two ways to calculate GDP, and why do they give the same result? 2. What's the difference between GDP and GNP? 3. What's per-capita GDP? Is it a good measure of welfare? Why or why not? 4. What is the PPP adjustment, how do we do it, and why? 5. What is the difference between nominal and real GDP (or per-capita GDP)? 6. Many things we think of as constituting economic activity do not get counted in the GDP. The book gives several examples. What are they, and why do they get missed in GDP calculations? 7. What is an index? What advantages does the income index in Chapter 2 have compared with an index based simply on country income rankings