Year: 1999 Source: Perceptual and Motor Skills, v.88, no.3, pt.2, (June 1999), p.1126 SIEC No: 19990578

Lester & Yang (1998) examined time-series suicide rates for 30 nations for 1960-1990 & calculated the coefficient of variation of suicide rates for each nation. This study used the employment ratio, the percentage of the population under the age of 15, & the mean suicide rate for each of the 30 nations in a multiple regression to predict the coefficient of variation. Nations with a higher proportion of the population under the age of 15 showed the greatest variation over the 30-year period.