Suggest me some economic concepts to learn

[nitsuj]

1. Supply and Demand
2. Trade Offs

Learn those two things and the rest is structure and relationships of markets and institutions.

lol, well in that case, supply / demand includes "trade offs".

 

[John Creighto]

For Ordinal Utility:

Parato Set (Parato optimal boundary)
Edgeworth box

For Wikipedia:
http://en.wikipedia.org/wiki/Edgeworth_box

also discussed in this lecture:
http://freevideolectures.com/Course/2878/The-Moral-Foundations-of-Politics/7