Economics!

7. People choose on their emotions rather than rationally
10. Any Arrangement that brings buyers & sellers together to do business with each other
12. Never enough of everything to satisfy everyone completely
13. The spending of time, money, effort, or other sacrifices to get something
15. Comes in the form of points & money offered
17. Value of the next best alternative
18. Anything used to produce a good or service
19. What you gain by adding one more unit to something
20. A penalty to stop you from doing something

1. Examination of additional benefits of an activity compared to the costs from the same activity
2. when something happens as a result of a plan that wasn't expected or planned
3. Collection of knowledge, abilities, skills, attitudes, and health you have
4. Anything used to produce an economic good or service
5. A cost that has already been spent but is not reversible
6. A person who purchases goods or services for personal use
8. Doing/not doing the right thing when no one is looking
9. Earned the title, "Father of Modern Economics"
11. An influencing factor that motivates one to do something
14. The amount of human satisfaction
16. Being seen to do the right thing