In one, they simply drop all observations with an unemployment spell spanning two consecutive interviews and, in the other, lagged receipt refers to whether the respondent was unemployed two years ago (rather than one year ago). It turns out that the basic model and the second variant provide similar estimates of the coefficient on lagged unemployment (Arulampalam, Booth, and Taylor 2000: Table 3) but the first variant, in which cases with spells overlapping interviews are dropped, leads to rather lower estimates of the coefficient on lagged unemployment (but it remains statistically significantly different from zero). Stewart (2007) also compares estimates of state dependence from a basic DREP model and one from which continuing spells are excluded and finds an even larger decline in the effects of lagged unemployment than Arulampalam, Booth, and Taylor: the estimated APE falls from 13 to 3.5 (Stewart 2007: 522).