“…Process inertia is well documented in the literature on chain reaction theory (Karanassou, Sala and Salvador, 2008) and is due to the presence of labour turnover costs (hiring, training and dismissal) and price and wage staggering, and to the existence of internal markets, unemployment duration effects and adjustments in the labour supply (because of emigration, for example). Another important factor is that the processes are interconnected with one another and with exogenous variables, the result being that external shocks create spillover effects, amplifying their short-run impact on the unemployment rate and extending their duration, while preventing the unemployment rate from converging on an invariant level in the long term (Karanassou andSnower, 1997 and.…”