00339nam a2200109Ia 4500008004100000245009100041260004900132260000900181300001000190500001300200650001600213170224s9999    xx            000 0 und d  aCollective nostalgia: A group-level emotion that confers unique benefits on the group.  bJournal of Personality and Social Psychology  c2014  a107:5  aNovember  xPsychology.