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发布于:2019-3-21 23:40:02  访问:19 次 回复: 篇
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College outcomes and labor marketplace participation (Heckman et al. 1998; Heckman, LaLonde
First, both figures show that family member migration is negatively and strongly related to youths‘ probability of matriculation, with effect sizes generally ranging from -.10 to -.20 for the transition to lower secondary and -.15 to -.30 for the transition to secondary school. Second, the parabolic shape of the plots implies that the migration effect diminishes gradually as children‘s baseline probability of matriculating tends toward 0 or 1. In other words, if a young person‘s eventual school continuation decision is a foregone conclusion--that is, if they are positioned at either end of the horizontal axis--then the experience of family member migration will have less of a bearing on 4E1RCat CAS whether they transition than would otherwise be the case.12 Figure 3 presents the analogous graph for nonmigrant youths‘ order Mubritinib economic activity. The graph shows an inverse relationship between family member migration and youths‘ probability of paid employment, a story that stands in contrast to the descriptive analyses presented earlier. Furthermore, unlike the estimate obtained from the uncorrected probit model, the change in probability associated with family member migration appears to be substantial, falling between -.15 and -.35 for the majority of "treated" youth. To better indicate the magnitude of this effect, consider a hypothetical child whose baseline probability places them right on the margin between working and not working. Inspection of the graph reveals that, net of measured and unmeasured characteristics, exposure to family member migration more than halves their probability of labor force partici.College outcomes and labor marketplace participation (Heckman et al. 1998; Heckman, LaLonde and Smith 1999). The estimator makes use of parameters in the switching regression models as an apparatus to recover the typical remedy effect among these in migrant member households, or what is often thought of as the typical remedy effect for the treated. Staying with all the variables and notation defined earlier, the formula applied to derive the estimates is(ten)NIH-PA Author Manuscript NIH-PA Author Manuscript NIH-PA Author ManuscriptDemography. Author manuscript; readily available in PMC 2013 Could 15.Halpern-MannersPagewhere 1k, 0k, k, 02, and 12 are quantities estimated in Eqs. (three)five), and exactly where { is the normal density function and { is the cumulative normal distribution (Heckman et al. 1999:861).11 Because the second stage of the switching regressions used a probit model, Eq. (10) yields estimates that can be interpreted either as effects on z-scores, or, alternatively, as effects of family member migration on the cumulative normal probability of the dependent variable net of measured and unmeasured factors. The results graphed below reflect the latter interpretation. Figures 1 and 2 display the effect of family member migration on youths‘ likelihood of making educational transitions. On each graph, the horizontal axis gives baseline probabilities of matriculating from one educational level to the next (or various counterfactual scenarios in which there are no migrant family members) and the vertical axis gives the change in probability associated with living in a migrant-sending family. The average treatment effect for the treated is plotted in black; the lower and upper bounds on this effect, which were derived using the 95 confidence interval on the parameter estimates obtained from the switching regression models, are shown in gray. Two patterns in particular stand out.
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