A nonparametric framework for comparing trends and gaps across tests. Journal of Educational and Behavioral Statistics, 34, 201-228. Website(2009).
Estimating achievement gaps from test scores reported in ordinal "proficiency" categories. Journal of Educational and Behavioral Statistics, 37, 489-517. Link to article(2012).
Estimating trends from censored assessment data under No Child Left Behind. Educational and Psychological Measurement, 70, 760-776. Website(2010).