Convinced that formal demography is the source of the discipline's strength, Vaupel contributed to the methodological foundations of demography. In 2001 he was awarded by the Population Association of America the
Irene B. Taeuber Award for his lifetime research achievements. In 2008 he received the Mindel C. Sheps Award for his work in mathematical demography. Vaupel was a leading proponent of the idea of the plasticity of longevity. Many people believe there is a looming limit to human
life expectancy. Vaupel's research shows that life expectancy is likely to increase well beyond the purported limit of 85 years. Furthermore, Vaupel and others (such as Bernard Jeune of
Denmark) advanced a new proposition: that the human
life span is not fixed, but is a function of
life expectancy and
population size. He and
S. Jay Olshansky had a disagreement about what this means in terms of future projections of the human life span. Vaupel's work also focused on the nascent field of evolutionary demography. His research activities here strived to understand age-specific mortality in terms of the evolutionary processes that shape it. Because in his studies, particular attention is paid to mortality improvements at the end of the lifespan, Vaupel was instrumental in the emerging field of research into
supercentenarians as a population subset. The number of persons aged 110+ in a single European nation is rather small. Vaupel therefore began the push in 2000 by inviting experts from around the world to meet in international workshops and to found the
International Database on Longevity, which provides information on individuals attaining extreme ages and permits demographic analysis of mortality at the highest ages. == Awards & recognitions ==