Religious conversion in 40 countries
The following citation is from the ICPSR Bibliography of Data-related Literature:
Barro, Robert, Hwang, Jason, McCleary, Rachel . Mar 2010. Religious conversion in 40 countries. Journal for the Scientific Study of Religion. 49, (1), 15-36. doi:10.1111/j.1468-5906.2009.01490.x
The citation above relates to an ICPSR study that is forthcoming.