Point-in-time sampling is in effect what studies based on household panel surveys with annual interviews have done. In a recent study based on monthly data for Norway, Bhuller, Brinch, and Kdnigs (2014) test for different types of state dependence and find evidence for occurrence dependence in social assistance entries and for duration dependence both on and off benefits. However, most studies of SA receipt for other countries have SA receipt histories at the annual level and model binary sequences of receipt and non-receipt and they do not look at spells.