e-journal
Communication and authority with a partially informed expert
A sender-receiver game a la Crawford-Sobel is analyzed where the sender has expertise on some
but not all the payoff-relevant factors. This residual uncertainty can either improve (even allow
full revelation) or worsen the quality of transmitted information depending on a statistic called the
effective bias. For symmetrically distributed residual uncertainty or quadratic loss functions, (i)
the quality of information transmission is independent of the riskiness of residual uncertainty, (ii)
it may be suboptimal to allocate authority to the informed player, (iii) despite players’ preferences
being arbitrarily close, it is impossible to assert that the receiver prefers delegation over authority
or vice versa.
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