Paul D. Allison Statistical Horizons, LLC Paul D. Allison, Ph.D., is Professor of Sociology at the University of Pennsylvania and President of Statistical Horizons. He is the author of numerous books and articles on statistical methods. He offers short courses on Survival Analysis, Categorical Data Analysis, Longitudinal Data Analysis, Missing Data, and Structural Equation Models. These courses are frequently presented as public seminars, and can also be given on-site at your firm. Prof. Allison is available for statistical consulting on a variety of topics. Recent News:  Paul Allison has been elected as a Fellow of the American Statistical Association. This award is given annually to a limited number of association members "of established reputation who have made outstanding contributions in some aspect of statistical work." The second edition of Paul Allison's Survival Analysis Using SAS has been published by the SAS Institute. To join our e-mail list, please click here. Schedule of Upcoming Seminars: Survival Analysis Using Stata September 17-18, Chicago Missing Data October 1-2, New York City Logistic Regression Using Stata October 29-30, Washington, DC Longitudinal Data Analysis Using Stata November 12-13, Miami Beach Longitudinal Data Analysis Using SAS December 3-4, Philadelphia