Mr. Madden has been with Market Decisions Research since 2003. He currently designs and manages survey research and program evaluation studies, with expertise in survey and sample development, advanced statistical analysis, and developing actionable reports based on primary and secondary research. He has special expertise in working with large-scale population health surveillance datasets, such as the BRFSS and YRBS, to conduct health impact analysis, time series modeling, segmentation, and multivariate analysis.