From the early seventies to-date Dr. Clancy published and presented at many professional conferences, new methodologies for segmenting markets using managerial, statistical and financial criteria. In recent years he has demonstrated that conventional attitudinal, lifestyle, needs state, behavioral and demographic approaches to market segmentation are not only weak in terms of actionability but, equally important, have little to do with the profitability of alternative targets. Today, his ideas, methodologies and models are increasingly recognized as the leading edge of market segmentation practice.