Probably the fencing. We have enough pseudo-experiments now that we can say the fencing makes a difference. There's a carpark in the UK that had trouble adding fencing, so they closed the top level.
I do not deny that it is a solution for spontaneous suicides in a younger (male?) demographics.
Do suicide methods of women or middle aged/elderly people differ?
What types of suicides do access restricting measures prevent?
Do people change methods?
And so on.
That may well be.
I do not deny that it is a solution for spontaneous suicides in a younger (male?) demographics. Do suicide methods of women or middle aged/elderly people differ? What types of suicides do access restricting measures prevent? Do people change methods? And so on.
Suicide is a graven field for social scientists.