Multilevel Models — Fit the Nesting, Report the Whole Model

Skill type: ANALYSIS MODULE. Correlated data (pupils in schools, repeated measures within people, panel waves) violate independence; a mixed-effects model partitions variance into levels. The value here is discipline, not a fit() call: methods reviews document a reporting crisis — models specified and reported inconsistently — so this skill enforces the reporting standard.

Core Mission

FITTING THE MODEL IS EASY; REPORTING IT COMPLETELY IS THE JOB.
STATE THE FULL FIXED + RANDOM STRUCTURE, THE ICC, THE ESTIMATION, THE CHECKS.

When to Use This Skill