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Posted by droodman on 10 May 2012 at 20:33 GMT

Even if we accept the concerns about data consistency and accept the highly imputed data, the relationship between DAH and GHE-S is not stable to the exclusion of a few data points. We replicated the author's fixed effects model (Arellano-Bover/Blundell Bond model). We confirmed their main results, but we further explored the sensitivity of the results to the exclusion of questionable data. The associations failed significance testing at p = 0.05 when excluding the lowest 10% of GHE-S using the IMF data and the lowest 20% of the WHO data.

I think most readers will read this to say: "We replicated the original regressions, tested them for robustness to exclusion of suspect data. They failed." But in the key results, in Table 4, the key parameter remains statistically significant 7 out of 8 times. (Look for the p values at or near 0 in the rows labelled "Arellano-Bond/Blundell-Bond model.")

No competing interests declared.