RT Journal Article SR Electronic T1 The fixed-effects model admittedly no quick fix, but still a step in the right direction and better than the suggested alternative JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 291 OP 292 DO 10.1136/jech.2010.131078 VO 65 IS 4 A1 Øystein Kravdal YR 2011 UL http://jech.bmj.com/content/65/4/291.abstract AB