This article reports a Monte Carlo evaluation of ordinal statistic d with modified confidence intervals (CI) for location comparison of two independent groups under various conditions. Type I error rate, power, and coverage of CI of d were compared to those of the Welch's t-test.
Feng, Du and Cliff, Norman
"Monte Carlo Evaluation of Ordinal d with Improved Confidence Interval,"
Journal of Modern Applied Statistical Methods: Vol. 3
, Article 6.
Available at: http://digitalcommons.wayne.edu/jmasm/vol3/iss2/6