Basic Economic Principles
How People Make Decisions How People Interact How aggregates work
1)People face tradeoffs (TANSTAAFL)
-what is a cost?
2)Opportunity Costs
-application: Broken Window
3) "Marginal Analysis"
-application: subjectivism
4) Sunk Costs
5) People Respond to Incentives
**We live in a world characterized by scarcity**
--more of us than stuff
--Resources scarce. trade one thing for another
1) When execute tradeoffs, says something about our values
Ex: More $$ to defense means less $$ to enviro protection
Other trade offs: economic efficiency & econ. equity
1) Make pie as big as possible
2) Make pie distributed; equitable
-->try to find "win-win" solutions
ex: $60,000 check, get only $28,000 out of it; Rizzo leaves advisor job, world loses that $
- investment banker makes 1 mill. and has $300,000 taken out of taxes; instead, quit job, teach for $50,000 and pay $15,000 in taxes-->no tax revenue, lose that production, only get "lousy class"
For "truly free" must produce & consume with out using any resources or sacrificing anything.
=>No such thing as free.
*It is possible to have to much of a good thing*
Totally possible to spend too much time studying.
Drug Lag: takes years to test drug, new drugs better than old, ppl who need but don't have harmed
Drug Loss: U.S. spends $50 bill on drug research, only 20 new drugs each year
- Testing costly, fewer profit opportunity
- can't solve AIDs & malaria BUT able to give 90 year olds boners (not my example)
- bad drug?!
- Ruin reputation, lose job, $
- good drug..
- no reward, no thanks
- what a messed up incentive! reward mistakes, not progress
What is a Cost?
-Anything that consumes resources
-Tradeoffs means endure a cost
2) Opportunity Costs
When make choices, realize what you give up.
**Net value of next best opportunity**
ex: lemons or limes? it's not the $ amnt, but rather the pleasure amnt
Lebron: College or NBA star? He did miss out on econ 108
ex; You won Bruce tickets! (not the same without the big man though)
-Cannot resell tickets, have to to
BUT also could see Barry Manilow for $40, but you'd pay $50 to see him.
What is the opportunity cost?
- $10!
- Net value of what you give up
- 50 - 40 = 10; WTP = willingness to pay
- Consider, must like Bruce at least $10 worth; say indifferent, still have to pay to see Barry
Broken Window
Say roof blown off Rizzo's house--> Pays $ to repair; $ to worker spent on lunch; $ to chef spent on...
BUT
what would happen if roof didn't blow off? Will never know. Could have paved driveway
- No new jobs created
- $ to construction, $ less elsewhere
- unable to pay to redo driveway
- job from one sector stimulated other less
- Didn't spend $ already means you value something else
- Imagine before/after
- before: Have $1,000, and a roof
- after: Have $0, and..a roof
- Actually poorer!
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