The dictionary defi nition of demography is “the study of population size, growth, and age structure (fertility, mortality, and immigration) that lead to population change” (American Heritage Dictionary 2006, 483). Of course, by referring to a dictionary, I have already identifi ed myself as not belonging to one of the younger cohorts of Americans, whose members would have looked it up online. The topic of this volume is the interface between demography and the economy. For our purposes, demography includes not only fertility, mortality, and immigration, but also the racial and gender composition of the population, living arrangements, marriage, divorce, the timing of the entry and exit from the workforce, and age- , gender- , and racespecifi c health and disability. Economic demography is a giant topic and the chapters in this volume, as good as they are, only scratch the surface of the important connections between the two fi elds.