General Biostatistics

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Improved generalized estimating equation analysis via xtqls for implementation of quasi-least squares in Stata (with Sarah J. Ratcliffe and Mary Leonard), UPenn Biostatistics Working Papers (2006)
 

Longitudinal Data Analysis and Time Series

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On The Violation Of Bounds For The Correlation In Generalized Estimating Equation Analyses Of Binary Data From Longitudinal Trials (with Wenguang Sun, Xin Tu, and Jay Amsterdam), UPenn Biostatistics Working Papers (2006)
 

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Use of Unbiased Estimating Equations to Estimate Correlation in Generalized Estimating Equation Analysis of Longitudinal Trials (with Wenguang Sun and Mary Leonard), UPenn Biostatistics Working Papers (2006)