The old saw goes: when you have a hammer, everything looks like a nail. But what if the best way to fix your broken policy is actually a bolt? I was recently at a workshop where someone was presenting preliminary results of an evaluation cash transfer program which, while perhaps started with social protection kind of objectives in mind, actually seems to have had impacts on business creation and revenues that dwarfed your average business training program or microfinance program.
Recently both the American Economic Association and 3ie have launched Impact Evaluation Trial Registries. The basic idea in both cases is for researchers to register in advance the details of an evaluation they are planning on doing. This has a couple of main purposes: