How the Swiss federal drug policy spreads to cantons and cities: an evaluation

Since the early 1990s, the Swiss Confederation has been promoting the “Four-Pillars” model to address drug-related issues. This model seeks to reduce drugrelated problems by intervention using the four fields of prevention, treatment, harm reduction, and repression. Since the Confederation has no constitutional competence in drug policy, it cannot enforce this model in a top-down manner. Instead, it must rely on other means in order to convince the main players of Swiss drug policy – the cantons and the cities – to adopt its ideas