I am applying for faculty positions as assistant professor. I have two questions regarding recommendation letters.
(1) Is there is a limit for the number of references? For me, I have many research collaborators who I can ask them to write me a reference letter. Most of faculty positions ask for three reference. Is it a good indicator when more than 3 references sent their letters to the research committee?
(2) Is it okay to add one reference who is currently assistant professor and was my lab mate for two years? We also co-authored many papers together.