Dr. Katrin Ewald specializes in program outcome evaluation, needs assessment and statistical analysis, as well as in quantitative and qualitative data collection methods for social sciences and related fields.  She has extensive experience in the concepualization, design and implementation of large-scale multi-mode survey research projects.  Her area of expertise comprises research in health care provision and decision-making, prevention research, public policy, and consumer and customer behavior.  Prior to joining PRS, Dr. Ewald was a research fellow with Catholic Healthcare West in San Francisco.  She received her doctorate in psychology from the University of Bielefeld, Germany.