# Questions tagged [random-effects-model]

Parameters associated with the particular levels of a covariate are sometimes called the “effects” of the levels. If the levels that are observed represent a random sample from the set of all possible levels we call these effects "random".

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### Multilevel model for education data, if individuals within cluster change (school) between time points

If I am wanting to fit a multilevel model across two time points and the first time point is Primary (uk education system, age 7-11 - keystage 2) but the second time point is secondary education (uk - ...
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### How to run a mixed ordinal logistic model with one random effect term when the random effect has only 2 levels

I am trying to run a mixed ordinal logistic model and I have already tried to use the clmm function, but my random effect only has two levels. I get the error message: Error in getREterms(frames = ...
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### Cox PH controlling for multiple events

I'm working on a cox proportional hazard analysis in R using the survival package. I´m analysing covariate effects on fish movement within a study area. The study area is divided into two zones ("...
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### question of a Poisson random effect model

Assume a Poisson random effect model (with a random intercept) $$\log E(Y_{it}|b_i,x_i)=\beta_0+\beta_1x_i+b_i$$ $$b_i \sim N(0,\tau^2)$$ How to derive the population-averaged effect of one unit ...
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### DF of multivariate multilevel random effects model

my question is concerning a multivariate multilevel random effects design. I have one between-subjects variable, gender. My outcome variable is composed of several (...
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### Results from a Hausman Test

If the results I get from running a Hausman test in STATA is Prob > chi2 = 0.4504 does this mean I should use a FE or a RE?