Do you want to do in behavioral analysis or investment analysis by the angel investor? First one better you can go for qualitative study for the identified angel investor and Second one aims at the quantitative study for angel investment analysis made in sectoral or geographical or continental analysis. Qualitative based I have published few article in this area.
Sorry for delayed reply. My mail id is [email protected], official mail id is [email protected]. My interest is also in understanding how Angel Investors evaluate & take investment decisions.