We consider the problem of obtaining locally D-optimal designs for factorial experiments with binary response and k qualitative factors at two levels each. Yang, Mandal and Majumdar (2011) considered this problem for 22 factorial experiments. In this paper, we generalize the results for 2k designs and explore in new directions. We obtain a characterization for a design to be locally D-optimal. Based on this characterization, we develop efficient numerical techniques to search for locally D-optimal designs.
Yun Chen has accepted a position as a Research Analyst at the Harvard School of Public Health, where she will be working in the field of adult AIDS.
Jing Shen currently works for IBM Watson Research Center in New York.
Jing Liu has accepted an offer from Fisher School of Accounting in the University of Florida.
Elizabeth Young is working on a PhD in statistics at Texas A&M University in the area of spatial statistics, and when she is not doing research, she enjoys swing dancing.
Xin Zhao is a Senior Risk Analyst for CompuCredit Corp. in Atlanta.
Lihua Wang currently works at J.P.Morgan Chase located at Wilmington, Delaware. She is in a risk modeling group focusing on acquisition risk. Lihua's daughter is 13 months now. Lihua's husband Ruijie, Niu, a master student in statistcs department of UGA, also works in J.P.Morgan Chase focusing on portfolio risk analysis.
"Both Zhengang and I still work at JPMorgan Chase. We are at the same building and carpool everyday. Our son just turned 3 and he can speak two languages now. We bought a house a few months ago and it seems that everything has settled down."
Matt Atkinson is now an instructor in the Department of Mathematics and Statistics at the Memorial University of Newfoundland, Canada.