Why are megachurches (at least 2,000 attendees in weekend services) and Meetup groups (www.meetup.com) more popular in some cities or states than others? Our answer: residential mobility (when people move a lot, they like groups that are easy to join and easy to leave; they might move again soon,...

Part I How can we know who is happy? Conceptual and methodological issues -- Objective happiness / Daniel Kahneman -- Ecological momentary assessment / Arthur A. Stone, Sual S. Shiffman, Marten W. DeVries -- Measurement issues in emotion research / Randy J. Larsen and Barbara L. Fredrickson --...

This article compares a general cross-lagged model (GCLM) to other panel data methods based on their coherence with a causal logic and pragmatic concerns regarding modeled dynamics and hypothesis testing. We examine three “static” models that do not incorporate temporal dynamics: random- and...