"Grissmer used an unusually creative combination of NELS, NLSY, and NAEP data to disaggregate the influence of demographic from other factors in changes in student achievement. It is remarkable that there has been little interest in following-up on this research, to attempt further to isolate the demographic factors and to specifically identify the residuals which might have included school as well as social policy changes. One suspects that the reason there has been so little interest in follow-up is that researchers are mostly, unlike Grissmer, unwilling to focus on "big ideas" and instead are focused on localizable and short-term policy interventions".
Comes from here.
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