We thank Mariacristina De Nardi, Francisco Gomes, Glenn Harrison, Sasha Indarte, Kieran Larkin, Francois LeGrand, Kim Peijnenburg, Kjetil Storesletten, Johannes Stroebel, Lesley Turner, Joe Vavra, Moto Yogo, and seminar participants at many conferences, universities, and research centers for useful comments and discussions. We are especially grateful to Andrew Caplin for his insightful counsel and his financial support in fielding the survey.