Uk= Wilson says we can use church statics, which went from 1.6 million in 1960 to 0.8 million in 2013
USA= Hadaway et al found people who claim to attend church is 83% higher than church statistics (religion as a tool for social mobility)
Explaining secularisation= Bruce said that Geographical mobility means religious word is being challenged + technological world view has replaced supernatural
Criticisms= Aldridge says religion has globalized belief networks so it's not longer area specific so hard to measure