Lecture 5 “additional notes on crossed random effects models”. Clustered versus non clustered random effects (Chap 11, new edition). We have discussed higher-level hierarchical models where units are classified by some factors (for example schools) into top level clusters at level L.
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Treatment random effects
Airport random effects
Attainment score at age 16 for student i who went
to secondary school j and primary school k
Variance across secondary schools
Variance across primary schools
Estimation using xtmixed
IC among children for the same primary schools but different secondary schools
IC among children for the same secondary schools but different primary schools
IC among children for the same primary and secondary schools
Given the secondary school, this denotes the IC correlation among children that had the same primary school