This fourth issue in the current four-volume series of Social Security Programs Throughout the World reports on the countries of the Americas. The combined findings of this series, which also includes volumes on Europe, Asia and the Pacific, and Africa, are published at six-month intervals over a two-year period. Each volume highlights features of social security programs in the particular region. The information contained in these volumes is crucial to our efforts, and those of researchers in other countries, to review different ways of approaching social security challenges that will enable us to adapt our social security systems to the evolving needs of individuals, households, and families. These efforts are particularly important as each nation faces major demographic changes, especially the increasing number of aged persons, as well as economic and fiscal issues. Social Security Programs Throughout the World is the product of a cooperative effort between the Social Security Administration (SSA) and the International Social Security Association (ISSA). The ISSA is the principal international institution bringing together social security agencies and organizations around the world. Founded in 1927, the ISSA is located at the International Labour Office in Geneva.