Since 1993, the University of Michigan Population-Environment Fellows Programs (PEFP) has linked the population and environment sectors of development both at the field level and in policy analysis. The PEFP and Denise Caudill of World Neighbors launched the Impact Assessment Project to develop a framework for assessing an integrated program. This article addresses project findings, including the successes, constraints, and obstacles of integrated/linked programs, as well as provides field examples from Ecuador and Madagascar. Denise Caudill, the coordinator for this project, offers lessons on the implications of implementing integrated/linked programs from the community to the national, regional, and international levels.