急：GDP的疑问

布兰查德第三版的习题：
Suppose that instead of cooking dinner for an hour, you decide to work an extra hour, earning an additional $12. You then take out some Chinese food, which costs you $10
      a. By how much does measured GDP increase?
      b. Should true GDP increase by more or less? Explain

什么是true GDP?

应该是实际GDP，和名义GDP相对的吧

GDP increase 12
       true GDP increase 2

GDP increase 22
       true GDP increase 12

cost10应该算中间产品吧，so GDP increase 12

好哈啊啊啊好

货币会贬值的，100斤小麦，每斤1元与每斤10元，名义GDP非常不同，但实际GDP却仍是100斤小麦