Attention Wal-Mart shoppers: You would be happier in church on Sunday mornings. That is the finding of one of two new studies on competition for church members’ time presented at the recent annual meeting of the Association for the Study of Religion, Economics and Culture. Another study shows many congregations are finding success offering secular programs such as exercise classes and book discussions alongside religious activities. The common theme: Religious groups cannot stand on the sidelines in the stiffening competition for the time, talents and treasure of potential worshippers.