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Everything about Mixed model

Statistical model containing both fixed effects and random effects

A mixed model, mixed-effects model or mixed error-component model is a statistical model containing both fixed effects and random effects. These models are useful in a wide variety of disciplines in the physical, biological and social sciences. They are particularly useful in settings where repeated measurements are made on the same statistical units, or where measurements are made on clusters of related statistical units. Mixed models are often preferred over traditional analysis of variance regression models because they don't rely on the independent observations assumption. Further, they have their flexibility in dealing with missing values and uneven spacing of repeated measurements. The Mixed model analysis allows measurements to be explicitly modeled in a wider variety of correlation and variance-covariance avoiding biased estimations structures. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Mixed modelA 5-minute orientation
  2. Skim a recent paper: glmm.hp: an R package for computing individual effect of predictors in generalized linear mixed modelsInfluential work since 2022
  3. Pick up a classic book: Mathematical Modeling of Concrete Mixture ProportioningThe most-reprinted book on the subject
  4. Read the landmark paper: Fitting Linear Mixed-Effects Models Using lme4Cited 80,837 times
  5. Go sideways: Multilevel modelA closely related topic
  6. Go sideways: Fay–Herriot modelA closely related topic

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🏆 Landmark papers (most cited)

🆕 Influential since 2022

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