We have plenty of research to show that method substitution is unusual.
This research comes from a few places: looking at people who've died by suicide and the methods they used, and any previous attempts. Looking at survivors of suicide attempts, and at what methods they've used in the past. And some natural experiments, such as the introduction of catalytic convertors to cars, or switching the UK gas supply from coal gas to natural gas.
This research comes from a few places: looking at people who've died by suicide and the methods they used, and any previous attempts. Looking at survivors of suicide attempts, and at what methods they've used in the past. And some natural experiments, such as the introduction of catalytic convertors to cars, or switching the UK gas supply from coal gas to natural gas.