what is SEI?
by Nohad El Hadoui
1. budget/utility/price/personal preference/influence from others
2. problem of scarcity
2.1. we have a lot of wants & needs
2.2. but we don't have enough money
3. needs & wants
3.1. need: something we need to survive
3.2. want: something we don't need, fun to have
4. social
5. economics
6. goods & services
6.1. good: something you can touch
6.2. service: someone does something for you
7. introduction
