There isn’t much cost analysis in impact evaluations. In McEwan’s review of 77 randomized experiments in education, he found that “56% of treatments reported no details on incremental costs, while most of the rest reported minimal details.”
I was at a workshop last week where I was moderating a discussion of the practicalities of doing impact evaluations in conflict and post-conflict settings. One of the program-implementation folks made clear that working with the impact evaluation was a strain -- as she put it this "was pulling our field staff through a keyhole". Which got me thinking about the costs that we, as impact evaluators, can cause for a program.