We evaluate Richard Posner's famous hypothesis that common law converges to efficient legal rules using a model of precedent setting by appellate judges. Following legal realists, we assume that judicial decisions are subject to personal biases, and that changing precedent is costly to judges. We consider separately the evolution of precedent under judicial overruling of previous decisions, as well as under distinguishing cases based on new material dimensions. Convergence to efficient legal rules occurs only under very special circumstances, but the evolution of precedent over time is on average beneficial under more plausible conditions.
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number
11265.
Length: Date of creation: Apr 2005 Date of revision: Handle: RePEc:nbr:nberwo:11265
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