RT Journal Article SR Electronic T1 Deriving relative risks from aggregate data. 2. An application to the relationship between unemployment and suicide. JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 336 OP 340 DO 10.1136/jech.42.4.336 VO 42 IS 4 A1 T Norström YR 1988 UL http://jech.bmj.com/content/42/4/336.abstract AB In Part 1 of this study, the mathematical relations between micro and macro measures of effect were derived. The formulas thus obtained can be used for cross level comparisons of findings concerning the effect of some specific risk factor on, eg, mortality. The approach is illustrated by means of an empirical example relating to the association between unemployment and suicide. This relationship is estimated on micro data as well as on aggregate time series data. The findings from the two levels are fairly consistent.