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.
In the life insurance industry, traditional actuarial science focuses on the analysis of mortality and the production of life tables, and the application of compound interest. More recently, actuarial science has come to embrace more sophisticated mathematical modeling of finance.