By Gregory B. Markus
An advent to a number of concepts which may be utilized in the research of knowledge from a panel research -- info bought from plenty of entities at or extra closing dates. the point of interest of this quantity is on research instead of difficulties of sampling or layout, and its emphasis is on program instead of conception.
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Extra info for Analyzing Panel Data (Quantitative Applications in the Social Sciences)
In addition, estimation procedures often require fairly precise a priori assumptions about latent classes and probabilities which Page 27 are not readily testable. A related point is that, as Wiggins himself recognized, the models provide no measure of goodness of fit by which they may be evaluated. This is a serious problem, although for models with more independent equations than unknowns, a chi-square procedure similar to that described for Markov models could probably be applied. Finally, from a more technical perspective, the estimation procedures have yet to be computerized, and handling variables other than dichotomies becomes unwieldly.
The equations for these proportions are: As before, the three equations may be solved for the three unknowns (Wiggins, 1973). 67. 00(361)(786)(1147) TABLE 13 Summary of Wiggins Model with True Change in One Direction OnlyLatent ClassLatent ProportionProbability of a 1 Responset = 1t = 2C11v11a1a1C12v12a11 a1C2101 a1a1C22v221 a11 a1 proportion of stable working class identifiers, v11. 06. Evaluation of the Wiggins Model These two examples demonstrate the ideas underlying the Wiggins family of models.
With reference to the American panel data, one factor which might plausibly affect transition rates for class identification is whether respondents perceived their financial situation to have improved or worsened in the time between waves. The expectation is that the probability of working class identification at time t should be relatively higher for respondents who felt that their financial status declined, identification at t 1 held constant. As Table 6 shows, this is the case. 00(35)(88)(123) Once again, a chi-square test may be employed to determine whether the two transition matrices in Table 6 are significantly different from each other.
Analyzing Panel Data (Quantitative Applications in the Social Sciences) by Gregory B. Markus