Answers are grounded in this paper and cite their sources.
The presence of suicide prevention centers in a state in 1970 was negatively associated with changes in the suicide rate from 1970 to 1980 in the USA, indicating a preventive effect from suicide prevention centers. This effect, though weak, was consistently found for most demographic subgroups of the population and when a strong social correlate of suicide rates (divorce rates) was taken into account by means of multiple regression analysis.
No takes yet. Share an insight, caveat, or question.
David Lester (1993) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: