Regional and time-series studies of suicide in nations of the world.

This article reviews simple epidemiological data on completed suicide rates in different nations of the world, the results of time-series studies of suicide in nations, and the results of regional correlates of suicide rates within nations. It is argued that it is important to conduct comparable sociological studies in samples of nations so that the general trends and deviations from these trends can be observed and efforts made to explain these phenomena.