The researchers behind the study, Rema Hanna of Harvard, and Esther Duflo and Michael Greenstone of theMassachusetts Institute of Technology, expected to confirm the health benefits of the $12.50 mud-based, chimneyed cookstoves installed in Orissa. In laboratory experiments, clean cookstoves have been shown to release fewer pollutants and burn more efficiently than traditional cooking methods. However, such tests can’t predict what will happen in the real world. That’s where a well-designed randomized trial is irreplaceable.
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