若き経済学者のアメリカEconomics ≫ Economics in The Economist 3

Economics in The Economist 3

3.Randomized Evaluation
(1)7/12記事
・A tribe of economists, most from Harvard University and the Massachusetts Institute of Technology (MIT), have begun to champion the latest thing in development economics: “randomised evaluations” in which different policies―to boost school attendance, say―are tested by randomly assigning them to different groups. In one celebrated example, researchers looked at what happened in 20 antenatal clinics in western Kenya when some gave away insecticide-treated bednets, an anti-malaria therapy, and others sold them for different prices.

・Randomised evaluations are a good way to answer microeconomic questions such as how to get girls to go to school, and teachers to turn up for work. They cannot tell you much about macro questions like the right exchange-rate or budget policy. But often, they provide information that could be got in no other way.

・So evidence from randomised trials is good. But is it better than other economic data?

・But is the evidence really incontrovertible? On its own terms, yes. But policymakers do not want to know whether something works in a few villages. They want to know whether it will work nationwide. Here, randomised trials may not be quite so helpful.

・But given doubts about how widely applicable such tests are, it may be better to think of them not as a new, superior form of development economics but as one more technique―admittedly a useful one―for finding out what works, filling in gaps in knowledge, testing policy ideas, and puncturing conventional wisdom. Dani Rodrik of Harvard University argues that differences in research methods between randomistas and other economists are in danger of re-opening a split between macro- and micro-economists that is starting to heal.

(2)Dani Rodrik's blog on "Re-uniting development economics"


(3)Chris Blattman's blog on "Randomized evaluations 2.0"


(4)Tool Kit
"Using Randomization in Development Economics Research: A Toolkit"(pdf) by Esther Duflo, Rachel Glennersterz and Michael Kremer



2009/09/04(金) | Economics | トラックバック(0) | コメント(0)

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