Book excerpt: The study of elderly entrepreneurship and its potential impact on labor, Social Security funds and regional economic growth is of significant importance, particularly for the US economy where population aging coincidentally intersects with the economic shift to a “knowledge economy”. On the one hand, aging, combined with a declining average retirement age, is expected to result in labor force shortages and Social Security fund exhaustion; yet on the other hand, the “knowledge economy” could elevate the value of elderly human capital as the “knowledge economy” is less physically demanding and more human-capital- and knowledge-based.Building on the utility maximization theory, economic growth theories and social theories of aging, this timely book addresses the old-age effect on entrepreneurial propensity; the sources of seniors' entrepreneurship, including the social and policy variables affecting seniors' entrepreneurship; and the economic, fiscal and labor impacts of elderly entrepreneurship.