Ken,
This publication came through the School for Advanced International Studies (SAIS), which is the graduate school for international relations based out of DC. Maybe the Roberts et al study was announced through SAIS, but I suspect that it came through Johns Hopkins proper since he was an epidemiologist working for the school of public health out of Baltimore. I was doing my MA at SAIS at the time both studies came out and don't remember them being publicized at SAIS (we did discuss the methodology in my applied econometrics class, but that was the only time that it really got air time in my classes). I don't know how independent the various schools under the Johns Hopkins brand name are, but SAIS is away from the flagpole, so to speak.
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