I’am not really sure if u could find any exclusive info on this but yes i can give u some tips to choose from.
Firstly as call centers employ a large population therefore it surely help in employement.
This profession does not have a age barrier therefore it could help even the senior citizens get a job (non voice call centers). I guess the main root cause of any community is unemployement and illiteracy, as this profession does not require a high level of academic qualification therefore it does solve the problem even more.
This industry is not dependent upon locational prefrences therefore it could help elevate even the less developed areas in a country.
I hope this would be enough for ur study in case u need more info, ask me.