## What is Xtmixed in Stata?

Description. xtmixed fits linear mixed models. Mixed models are characterized as containing both fixed effects and random effects. The fixed effects are analogous to standard regression coefficients and are estimated directly.

**What is Meglm Stata?**

Description. meglm fits multilevel mixed-effects generalized linear models. meglm allows a variety of distributions for the response conditional on normally distributed random effects.

**What is Melogit?**

Description. melogit fits mixed-effects models for binary and binomial responses. The conditional distribution of the response given the random effects is assumed to be Bernoulli, with success probability determined by the logistic cumulative distribution function.

### What is the difference between mixed and Xtmixed Stata?

xtmixed has been renamed to mixed. xtmixed continues to work but, as of Stata 13, is no longer an official part of Stata. This is the original help file, which we will no longer update, so some links may no longer work.

**What is multilevel linear regression?**

Multilevel models (MLMs, also known as linear mixed models, hierarchical linear models or mixed-effect models) have become increasingly popular in psychology for analyzing data with repeated measurements or data organized in nested levels (e.g., students in classrooms).

**What is multilevel logistic regression?**

Multilevel logistic regression models allow one to account for the clustering of subjects within clusters of higher‐level units when estimating the effect of subject and cluster characteristics on subject outcomes.

#### What is Xtlogit?

Description. xtlogit fits random-effects, conditional fixed-effects, and population-averaged logit models for a binary dependent variable. The probability of a positive outcome is assumed to be determined by the logistic cumulative distribution function. Results may be reported as coefficients or odds ratios.

**What is mixed model in statistics?**

A mixed model (or more precisely mixed error-component model) is a statistical model containing both fixed effects and random effects. It is an extension of simple linear models. Sample sizes might leave something to be desired too, especially if we are trying to fit complicated models with many parameters.

**When would you use a multilevel regression model?**

Multilevel models are particularly appropriate for research designs where data for participants are organized at more than one level (i.e., nested data). The units of analysis are usually individuals (at a lower level) who are nested within contextual/aggregate units (at a higher level).

## What is multilevel data analysis?

Multilevel Analysis may be understood to refer broadly to the methodology of research questions and data structures that involve more than one type of unit. This originated in studies involving several levels of aggregation, such as individuals and counties, or pupils, classrooms, and schools.

**What is multi-level data?**

**What is multilevel modeling in statistics?**

Multilevel modelling is an approach that can be used to handle clustered or grouped data. Multi-level modelling provides a useful framework for thinking about problems with this type of hierarchical structure.