A semiparametric mixture model is characterized by a non-parametric mixing distribution <b><scriptface>Q</scriptface></b> (with respect to a parameter <b>"θ"</b>) and a structural parameter <b>"β"</b> common to all components. Much of the literature on mixture models has focused on fixing <b>"β"</b> and estimating <scriptface>Q</scriptface>. However, this can lead to...

When thousands of tests are performed simultaneously to detect differentially expressed genes in microarray analysis, the number of Type I errors can be immense if a multiplicity adjustment is not made. However, due to the large scale, traditional adjustment methods require very stringen...

This letter proposes modeling a large collection of test statistics, such as may arise in microarray data analysis, using a mixture of three normal distributions: one with mean zero, one with nonnegative mean, and one with nonpositive mean. A convenient procedure is established for testing...

Purpose – Managers’ willingness to proceed with right action can be diminished by the need for approval and feeling the negative emotions that often accompany ethical challenges. This paper seeks to describe Balanced Experiential Inquiry (BEI), a learning activity designed to help managers...

Purpose – The purpose of this paper is to focus on an inward drive and commitment toward ethical discovery, which the authors refer to as the competency of moral curiosity. When directed toward moral decision making, the authors believe this ability can help managers effectively respond to...