query: What is a fixed effect in a mixed model compared to a fixed effect model for panel data?
positive_passages.docid: 145672
positive_passages.text: How exactly does a "random effects model" in econometrics relate to mixed models outside of econometrics?
negative_passages.docid: 53854
negative_passages.text: Within, between or overall R-square for random effects in Stata
negative_passages.docid: 145200
negative_passages.text: What exactly is the difference between a parametric and non-parametric model?
negative_passages.docid: 151995
negative_passages.text: Why are effect size estimates (such as $R^2$) difficult in mixed-effects models?
negative_passages.docid: 147938
negative_passages.text: MAPE vs R-squared in regression models
negative_passages.docid: 100842
negative_passages.text: How are propensity scores different from adding covariates in a regression, and when are they preferred to the latter?
negative_passages.docid: 121204
negative_passages.text: Is it preferable to subset data to test specific hypotheses or specify a full model and run contrasts?
negative_passages.docid: 57834
negative_passages.text: In a Poisson model, what is the difference between using time as a covariate or an offset?
negative_passages.docid: 4826
negative_passages.text: Differences between MANOVA and Repeated Measures ANOVA?
negative_passages.docid: 53762
negative_passages.text: Is it meaningful to identify interaction effect when a main effect in a model (main effects only, without interaction terms) is not significant?
negative_passages.docid: 147224
negative_passages.text: What is the difference between zero-inflated and hurdle models?
negative_passages.docid: 76276
negative_passages.text: Logistic Regression: Bernoulli vs. Binomial Response Variables
negative_passages.docid: 145044
negative_passages.text: Why do I get zero variance of a random effect in my mixed model, despite some variation in the data?
negative_passages.docid: 153894
negative_passages.text: lme4::lmer reports "fixed-effect model matrix is rank deficient", do I need a fix and how to?
negative_passages.docid: 38104
negative_passages.text: How to test the effect of a grouping variable with a non-linear model?
negative_passages.docid: 122659
negative_passages.text: $R^2$ for mixed models with multiple fixed and random effects
negative_passages.docid: 20763
negative_passages.text: Why could centering independent variables change the main effects with moderation?