Significant demographic changes are altering the structure of the American population. Larger numbers of immigrants are entering the work force, will become part of our aging population, and increasingly, are providing care for the elderly. Family structures and communities are evolving as marriage, childbearing, divorce, and cohabitation trends are changing. The working population that supports the elderly, physically and economically, is also changing and will most likely become smaller and less able to support this growing population.

What does this mean for the well-being of...