This paper uses data for the UK and the Netherlands (1983q4-2011q4) to test if hysteresis occurs in these economies, and through what mechanisms. The novelty of the paper resides in the use of a VAR-IRF that encompasses previous hysteresis studies, using long-term unemployment, productivity, capital stock and real long-term interest rates, and in the use of specific Labour Market Institutions shocks, such as benefits, taxation or unions' power. This allows us to disentangle what specific demand and supply-variables affect unemployment in the long-run, i.e. the NAIRU. Our findings suggest that there is hysteresis in both countries, and that it happens through several channels. Further, we find that the influence of Labour Market Institutions on unemployment depend on their impact on the real wages-productivity gap. These results have implications for structural and macroeconomic policies that we also discuss. Finally, we investigate the impact of different supply and demand-shock on long-term unemployment and discuss the relevant policy implications.Keywords Hysteresis · NAIRU · Labour Market Institutions · Impulse response analysisWe would like to thank the referee and the editor for their comments and useful suggestions. We are also grateful to