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:
David McKenzie's blog
There has been a lot of recent debate and discussion about the role of cash grants in aid, and whether aid is more effective when simply given as unrestricted cash compared to approaches such as conditional transfers which try to restrict how recipients use any money received. Traditionally this debate has centered around food aid and education funding, but more recently this discussion has also arisen with respect to funding small businesses.
A common critique of many impact evaluations, including those using both experimental and quasi-experimental methods, is that of external validity – how well do findings from one setting export to another? This is especially the case for studies done on relatively small samples, although as I have ranted before, there appears to be a double standard in this critique when compared to both other disciplines in economics and to other development literature.
- On the promise and perils of sharing work in progress – nice discussion on the MonkeyCage blog, including references to Berk’s post on the problems of working papers.
- Berk and co-author’s systematic review of the relative effectiveness of conditional and unconditional cash transfers is now out in The Campbell Collaboration Library.
- In Science last week, Sendhil Mullainathan and co-authors have work showing the cognitive costs of poverty. The Atlantic cities has a summary.
While the blog was on break over the last month, a couple of posts caught my attention by discussing whether it is ethical to do experiments on programs that we think we know will make people better off. First up, Paul Farmer on the Lancet Global Health blog writes: