Evaluation designs for social programs are developed assuming minimal or no disruption from external shocks, such as natural disasters. This is because extremely rare shocks may not make it worthwhile to account for them in the design. Among extreme shocks is the 2010 Chile earthquake. Un Buen...

Un Buen Comienzo, an ongoing early childhood program in Chile, was directly affected by the 2010 earthquake in that country. This article discusses the factors the team considered for deciding whether to put on hold or continue implementation and data collection for this experimental study.