In the United States, entitlement to Temporary Assistance for Needy Families is subject to time limits, which vary across the states. The net replacement rates presented in Table 1.1 exclude social assistance and housing benefits, which are analysed separately below. The tight eligibility rules regulating these programmes of last resort, especially with respect to accumulated assets, makes it difficult to identify a typical point during a spell of unemployment when a worker who has exhausted UB would become eligible for SA.