Key points are not available for this paper at this time.
What "Triggers" Mortgage Default? by Ronel Elul, Nicholas S. Souleles, Souphala Chomsisengphet, Dennis Glennon and Robert Hunt. Published in volume 100, issue 2, pages 490-94 of American Economic Review, May 2010
Elul et al. (Sat,) studied this question.