Cfa level i economics

Hi

Appeared for June 2012 CFA level I. I thought Economics was the most difficult subject of all. 

In case if there;s any one planning to write CFA l-I, please do not use Schwesers for Economics.

I mostly did my studies from classroom notes and CFA videos provided to us.

here's sample of one of the video's: 

https://fintreeindia.com/cfa-level-i-economics-the-firm-and-market-structure-reading-16-part-i/