The author of the site Epiphenom has compiled an interesting roll up of studies related to religion and social practice, mental health, and politics (among other things). His compilation includes the impact religious belief has on things like smoking and overeating, racism, sexual behavior, and giving blood. He links to studies that focused on religion and education particularly how religious people view science and the impact literature has on religious belief.
See his report here.
Link reposed from Common Sense Atheism