id author title date pages extension mime words sentence flesch summary cache txt p5547p90t1d Rachel Baird The Effect of Misspecifying Random-Effect Time-Varying Predictors as Fixed on Estimates of Other Parameters 1904 .txt text/plain 243 7 26 Although negative variance estimates are uninterpretable, results of the simulation show that estimates of the fixed effect of the time-varying predictor are as accurate for these cases as for cases with positive variance estimates, and that treating the time-varying predictor as random and allowing negative variance estimates performs well whether the time-varying predictor is fixed or random in reality. A second simulation study shows that treating the time-varying predictor as random may have poor convergence, except when allowing negative variance estimates. cache/p5547p90t1d.txt txt/p5547p90t1d.txt