The full introduction is in lecture 1 page 13 &14
The method should include RCT, FE, DID, IV, and RD one of them Randomized controlled trial fixed effectdifference-in-differences Instrumental variables and Regression discontinuity. Write the regression, but you do not need specific data to run. You need to have figures indeed. Make sure you analysis them.
How to write a research proposal is in the lecture slides. Please make sure you read them carefully.
The format should include a title, abstract, keywords, footprints, and references. Avoid any form of plagiarism.
The diagrams are needed, you can