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Adam C Carle
Correspondence: Adam C Carle firstname.lastname@example.org
BMC Medical Research Methodology 2009, 9:49 doi:10.1186/1471-2288-9-49
(2009-08-21 15:28) Division of Health Policy and Clinical Effectiveness
Equation C.2.2 contains a typographical error. It should not include the line reading
B_1j=B_1+u_1j. This line indicates a random effect for family income. It does not
belong in the fixed effects only model. When reading these equations, please ignore
this typographical error.
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