In fulfilling its mission of monitoring the current and future financial status of the Social Security program, SSA's Office of the Chief Actuary conducts extensive research. We evaluate short-term and long-term demographic and economic trends and analyze experience in mortality and morbidity rates. The results of much of this work are made available to the public through the publication of reports and special studies on many aspects of the Social Security system. The more extensive of these reports are published in a series of Actuarial Studies, while the briefer reports have appeared in a series of Actuarial Notes (below). We have grouped these Notes into two general categories: Annual Recurring Notes and Special Topic Notes, with the latter subdivided by decade of publication.