I am currently writing my bachelor thesis on peer effects. However, the more I read about the identification problems (I read e.g. Manski, Moffitt, Angrist, Goldsmith et al.), the less I understand. I particularly have a problem with understanding how endogenous selection affects my estimates (omitted variables? Selection bias?) and understanding the correlated unobservables/ related errors in variables and the endogenous membership problem and how or whether they relate to each other.
I know this is a lot but any help is appreciated!!! Thanks a lot!!!