Editor’s Note: The following article was written by Anthony Nyberg and Charlie Trevor, based on their research and also drawing on the research of others including Teresa M. Amabile of Harvard, Regina Conti of Colgate, and Wayne F. Cascio of the University of Colorado. The article, to appear in June’s issue of HBR, builds on surprising findings by Nyberg and Trevor that we reported in May 2008, showing that layoffs prompt survivors to quit.   –Andy O’Connell