By Steven Eric Finkel
Panel facts - details accrued from an identical contributors or devices at a number of diversified time cut-off dates - are regular within the social sciences to check theories of person and social switch. This e-book highlights the advancements during this procedure in a number of disciplines and analytic traditions.
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Additional info for Causal Analysis with Panel Data (Quantitative Applications in the Social Sciences)
Regression effects are not always present in panel data, but it can be shown that a negative correlation between a variable's initial value and Page 9 subsequent change can be expected whenever (a) the variable is not perfectly correlated over time and (b) its variance is relatively constant (Bohrnstedt, 1969; Kessler & Greenberg, 1981; Nesselroade, Stigler, & Baltes, 1980). Under these circumstances, including Yt - 1 in the regression model is a way of controlling for this phenomenon, and frames the analysis in the following fashion: Do the independent X variables influence changes in Y for fixed levels of Yt - 1, that is, taking into account the negative effect of initial values of Y on subsequent change?
Hence OLS estimates in the presence of lagged dependent variables are consistent, although not technically unbiased. 34. 10, and this effect is statistically significant at conventional levels. 10 change in legal protest potential between 1987 and 1989, controlling for initial levels of protest. 60, effect on the change in protest between the two waves. 60, indicating that protest adjusts by 60% to its optimal (equilibrium) level from one time period to the next. 10], the estimated b1 divided by a).
The results indicate that current group memberships is significantly related to protest potential, controlling for lagged Y and lagged group memberships. Controlling for current group memberships, lagged group memberships is statistically insignificant and adds little additional explanatory power to the model. 13), the effect of GROUPS2 also may be interpreted as the effect of the changes in group memberships on PROTEST2, controlling for lagged group memberships and lagged protest potential. Panel Models in Continuous Time The previous section discussed procedures for estimating the proper lag structure for the effects of X to be felt on Y over a given time interval.
Causal Analysis with Panel Data (Quantitative Applications in the Social Sciences) by Steven Eric Finkel