第15页

How People 
#1: People face tradeoffs
Make Decisions
#2: The cost of something is what you give up to get it
#3: Rational people think at the margin
#4: People respond to incentives
How People Interact
#5: Trade can make everyone better off
#6: Markets are usually a good way to organize economic activity
#7: Governments can sometimes improve market outcomes
How The Economy As A Whole Works
#8: A country's standard of living depends on its ability to produce goods and services
#9: Prices rise when the government prints too much money
#10: Society faces a short-run tradeoff between inflation and unemployment