[영문]This paper examines the pensionable or early retirement age in social security in 23 OECD countries over the years 1949-2035. The policies for future years are those in current law, with some not being fully effective until 2035. The paper documents a pattern of decreasing pensionable ages that reversed in the 1990s, with many countries raising pensionable ages since the beginning of that decade, though generally with future effective dates. Pensionable-age policy provides insight into broader issues in social policy, such as whether social policies across countries have converged over time. The paper also examines the time pattern in the movement toward gender equality in social programmes.