U.S. Justice Department: Does Neighborhood Watch reduce crime? Neighborhood Watch programs became popular in the 1970s and 1980s; by 2000, roughly 40% of the U.S. residential population was covered by such citizen crime-watching programs.
Definition of actuarial. 1  1 : of or relating to actuaries. 2  2 : relating to statistical calculation especially of life expectancy.
Actuarial Science. The typical major for students wanting to become an actuary is actuarial science. Though employers may hire students holding degrees in other majors, employers may show preference to actuarial science graduates. Actuarial science is the study of the mathematical concepts used by actuaries to calculate risk.