Adam Smith, in Wealth of Nations, observed that even religious monopolies become weak when they are not challenged by competition. Data to illustrate this point is from 21 countries in which the percentages of Catholics in the populations varied from a low 1.2% to a high 97.6%.
A data frame with 21 observations on the following 4 variables.
a character vector indicating the country
percent Catholics in the population
priest to parishioner ratio
percent clergy indigenous
Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.
Gill, A.J. (1994). Rendering unto Caesar? Religious Competition and Catholic Political Strategy in Latin America, 1962–79, American Journal of Political Science 38(2): 403–425.