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2006 Dec 28
0
lmer: Interpreting random effects contrasts and model formulation
...ine effect is constant across 
Populations, I have:
measure_ijk = mu + P_i + L_ij + e_ijk where L ~ N(0,s_L)
measure ~ 1 + Population + (1|Population:Line)
(b) If instead I want to allow the random Line effect to be Population 
specific, I put:
measure_ijk = mu + P_i + L_ij + e_ijk where L_i ~ N(0,s_L_i)
measure ~ 1 + Population + (Population | Population:Line)
(c) Question 1:  if instead, I put:
measure ~ 1 + Population + (1 | Population:Line) + (Population | 
Population:Line)
would the model be:
measure_ijk = mu + P_i + L_ij + e_ijk where L_i ~ N(0,s_L_i)+N(0,s_L) ?
(d) Question 2:  in (b) abo...