Ming H. Jih, MD, PhD; Paul M. Friedman, MD; Arash Kimyai-Asadi, MD; Edward S. Friedman, MD; Sharon R. Hymes, MD; Leonard H. Goldberg, MD; DermSurgery Associates (Drs Jih, P. M. Friedman, Kimyai-Asadi, and Goldberg), The University of Texas School of Medicine (Dr P. M. Friedman), Baylor College of Medicine (Dr E. S. Friedman), and The University of Texas M. D. Anderson Cancer Center (Drs Hymes a...

The Pólya process is an urn scheme arising in the context of the contagion spreading. It exhibits unstable persistence effects. The Friedman urn process is dual to the Pólya one with antipersistent stabilizing effects. It appears in a safety campaign problem. A Pólya-Friedman urn process is investigated with a tuning persistence parameter extrapolating the latter two extreme processes. The stud...

Adrienne S. Glaich, MD; Leonard H. Goldberg, MD, FRCP; Tianhong Dai, PhD; Joy H. Kunishige, MD; Paul M. Friedman, MD; DermSurgery Associates, Houston, Texas (Drs Glaich, Goldberg, and Friedman); and Departments of Dermatology, Weill Cornell Medical College, Methodist Hospital, Houston (Drs Goldberg and Friedman), Harvard Medical School, Boston, Massachusetts (Dr Dai), and The University of Texa...