Disclosing Bias Doesn’t Cancel Its Effects

Trust but verify, especially when we’re paying someone for their advice. Because even when the professional discloses his bias — a banker who stands to gain from a merger, say — we still don’t discount it enough when coming to our conclusion.

We ordinary folks have to gauge, sometimes on the spot, whether a specialist’s opinion is worth the price, and whether that person stands to gain because you are not sure what they are talking about.

For example, a fair amount has been written about whether the perks that doctors receive from pharmaceutical companies bias the doctors. Other research suggests that consumers would do well to think twice before assuming a professional’s advice is worth the price.

In a study published in 2005 in The Journal of Legal Studies, 147 subjects were asked to assume either the role of an adviser or of someone depending on advice. The researchers set up two experimental conditions. In both, there was a conflict of interest: the advisers stood to gain financially if the clients followed their biased advice.

In the first condition, in which the advisers did not disclose their conflict of interest, they knowingly gave misleading advice. In the experiment, the clients lost money because they followed the advisers’ suggestions.

In the second condition, the advisers disclosed their conflict of interest: they conceded they would benefit if the clients heeded the advice. But coming clean didn’t have the expected result. Although the clients, now aware that their advisers were biased, were more skeptical about taking the advice, ”they didn’t discount it enough,” said George Loewenstein, a professor of economics and psychology at Carnegie Mellon University and a co-author of the study, which was conducted at the university.

And the advisers, still determined to make more money, exaggerated their claims. ”The advisers ended up making even more money than in the first condition, which is exactly the opposite of what you would hope for or expect,” he said.

From this Times$elect article, via my homeboy Ramit.

1 comment on “Disclosing Bias Doesn’t Cancel Its Effects
  • I am so keen to post a link to this on a blog I read; but disagreements there degenerate into flame wars, and if you point out bias, others say you are biased against seeing the writer’s perspective. Hmm.

    Especially the limits of most people’s ability to process a load of data is very much a real problem. As you say: “we still don’t discount it enough when coming to our conclusion.”. Because most can’t.

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