Author Archives: Jason Kerwin

About Jason Kerwin

http://nonparibus.wordpress.com/author

Hormonal contraceptives and HIV transmission – do we *want* to separate biology from behavior?

A new piece in the Lancet by Heffron et al. finds that hormonal contraception (specifically the injection-based method most common in sub-Saharan Africa) roughly doubles the risk of HIV transmission between an infected partner and an uninfected one. My first … Continue reading

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Don’t *artificially* restrict your experiment samples!

My colleague Adam rightfully approves of the spread of RCTs as a means of evaluating interventions, but raises a couple of important concerns about drawing inferences with them. His overall point about the generalizability of results is on point: especially … Continue reading

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External validity in field experiments & The Place That Shall Not Be Named

Over at Development Impact, David McKenzie summarizes a new paper that looks at the external validity of field experiments by comparing the results of the same experiment run in different places. The logic is simple: use the results of one … Continue reading

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Why are there missing financial markets in poor countries?

In my critique of finance as a solution to problems in poor countries, I emphasized that researchers have underemphasized the fundamental point of why the highly-effective financial instruments they’re offering don’t already exist in the communities they study. In a … Continue reading

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Setting reasonable expectations for aid

Owen Barder has a great post today on what we know about the effectiveness of foreign aid. Broadly, the answer is that we don’t know much, but that what we do doesn’t support the strong claim that aid lifts people … Continue reading

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Lies, Damned Lies, and Hospital Administrative Data

A recent post by Kate Cronin-Furman at wronging rights explains how the numbers on rape in the Congo can mislead us. The problem she highlights is a general issue with relying on data from hospital admissions in order to measure … Continue reading

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The famine in the Horn of Africa is not because of food shortages

Via texas in africa, Edward R. Carr explains what we know about the cause of the burgeoning famine in Somalia: The long and short of it is that food insecurity is rarely about absolute supplies of food – mostly it … Continue reading

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