Ed exactly once. Previous addresses in Los Angeles County are geolinked to the correspondent Chloroquine (diphosphate)MedChemExpress Chloroquine (diphosphate) Census tract. However, we omit the small percentage (6.5 ) of moves that occurred outside of Los Angeles County. We measure CibinetideMedChemExpress ARA290 mobility in terms of annual moves, and observe up to two moves per respondent. Figure 6 shows one hypothetical mobility history for an LA FANS respondent. Because we examine annual mobility, multiple moves that occur within a single year are counted as a single move. Table 5 summarizes the information available for the analysis of residential mobility using the LA FANS data.14 The 2,332 respondents provide information on 4,508 annual residential mobility decisions.15 As indicated by the comparison with the 2000 Census data for Los Angeles County, our data over-represent Hispanics and under-represent non-Hispanic whites and Asians. Despite the relatively large number of mobility decisions faced by LA FANS respondents, they report only 412 annual between-tract moves during the two-year mobility window, and 105 within-tract moves. For the purposes of this analysis, we consider moves to occur only if a respondent changes Census tracts during the annual mobility period. Choice-Based Sampling–The L.A.FANS is a stratified sample that overrepresents neighborhoods where at least 40 percent of households have incomes below the poverty line. For the purpose of estimating models of neighborhood choice, L.A.FANS is a choice-based sample. Our models include Manski-Lerman weights (see Equation 4.5) to correct for the differential representation neighborhoods in the data. A further complication is that the data come from retrospective mobility histories. Thus, whereas L.A.FANS is a choice based sample at the time of the survey, prior to that respondents could live anywhere conditional on living in one of the sampled tracts when the data were collected. Thus the sample is purely choice-based at the time of the survey (Year 2, as shown in Figure 6), but influenced in a complex way by the choice-based sample in the periods prior to the survey date. Thus, we create two sets of Manski-Lerman weights: one using the distribution of choices at the time the LA FANS sample was drawn (in Year 2 of the mobility window), and one using the distribution of choices one year prior (Year 1 of the mobility window).NIH-PA Author Manuscript NIH-PA Author Manuscript NIH-PA Author Manuscript13We estimate these models using the GLLAMM module within Stata. Because of small sample sizes we were unable to obtain estimates for Asians who were asked about white neighbors. 14The LA FANS restricted data provided geocoded addresses mapped to 1990 tract boundaries. Thus the 2000 data shown in this table are adjusted to 1990 tract boundaries. 15Respondents who failed to provide valid information about their location 12 months prior to the interview data are omitted from the sample. Respondents who provided valid information about their location 12 months prior to the interview date but failed to provide valid information about their location 24 months prior to their interview contribute one observation to the data: a mobility decision from the second year.Sociol Methodol. Author manuscript; available in PMC 2013 March 08.Bruch and MarePageTable 6 illustrates the construction of Manski-Lerman weights in the LA FANS. The first column (Hi) shows the distribution of respondents across the sampling stratum in each of the two years, whereas the second column (Wi) shows the dist.Ed exactly once. Previous addresses in Los Angeles County are geolinked to the correspondent Census tract. However, we omit the small percentage (6.5 ) of moves that occurred outside of Los Angeles County. We measure mobility in terms of annual moves, and observe up to two moves per respondent. Figure 6 shows one hypothetical mobility history for an LA FANS respondent. Because we examine annual mobility, multiple moves that occur within a single year are counted as a single move. Table 5 summarizes the information available for the analysis of residential mobility using the LA FANS data.14 The 2,332 respondents provide information on 4,508 annual residential mobility decisions.15 As indicated by the comparison with the 2000 Census data for Los Angeles County, our data over-represent Hispanics and under-represent non-Hispanic whites and Asians. Despite the relatively large number of mobility decisions faced by LA FANS respondents, they report only 412 annual between-tract moves during the two-year mobility window, and 105 within-tract moves. For the purposes of this analysis, we consider moves to occur only if a respondent changes Census tracts during the annual mobility period. Choice-Based Sampling–The L.A.FANS is a stratified sample that overrepresents neighborhoods where at least 40 percent of households have incomes below the poverty line. For the purpose of estimating models of neighborhood choice, L.A.FANS is a choice-based sample. Our models include Manski-Lerman weights (see Equation 4.5) to correct for the differential representation neighborhoods in the data. A further complication is that the data come from retrospective mobility histories. Thus, whereas L.A.FANS is a choice based sample at the time of the survey, prior to that respondents could live anywhere conditional on living in one of the sampled tracts when the data were collected. Thus the sample is purely choice-based at the time of the survey (Year 2, as shown in Figure 6), but influenced in a complex way by the choice-based sample in the periods prior to the survey date. Thus, we create two sets of Manski-Lerman weights: one using the distribution of choices at the time the LA FANS sample was drawn (in Year 2 of the mobility window), and one using the distribution of choices one year prior (Year 1 of the mobility window).NIH-PA Author Manuscript NIH-PA Author Manuscript NIH-PA Author Manuscript13We estimate these models using the GLLAMM module within Stata. Because of small sample sizes we were unable to obtain estimates for Asians who were asked about white neighbors. 14The LA FANS restricted data provided geocoded addresses mapped to 1990 tract boundaries. Thus the 2000 data shown in this table are adjusted to 1990 tract boundaries. 15Respondents who failed to provide valid information about their location 12 months prior to the interview data are omitted from the sample. Respondents who provided valid information about their location 12 months prior to the interview date but failed to provide valid information about their location 24 months prior to their interview contribute one observation to the data: a mobility decision from the second year.Sociol Methodol. Author manuscript; available in PMC 2013 March 08.Bruch and MarePageTable 6 illustrates the construction of Manski-Lerman weights in the LA FANS. The first column (Hi) shows the distribution of respondents across the sampling stratum in each of the two years, whereas the second column (Wi) shows the dist.