With regard to the 2008 US elections, both Justin Wolfers and Robin Hanson implied that BetFair is not as predictive as it should be.

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Previously: About Justin Wolfers&#8217-s column

Justin Wolfers&#8217- Freakonomics post (which suggests that BetFair would have a better predictive power if US traders could use it).

Do the top brass really tell everything to the trading employees? Do the EPM traders have access to all the primary indicators?

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Prediction markets: the future of decision-making – Companies are now making business decisions based on information employees provide via internal trading systems. – The Times of London – 2008-09-04

&#8220-We use them [“them” = the enterprise prediction markets] as another point in the decision-making process, alongside asking experts and other business leaders,&#8221- said Christina LaComb, a computer scientist in the R&amp-D lab at GE.

OK. You&#8217-re using enterprise prediction markets- you&#8217-ve gotten your name in the newspapers- you&#8217-re &#8220-cool&#8221-.

And our good friend David Perry&#8217-s gotten your money.

But do your event derivative traders have the same access as you do to &#8220-experts&#8221- and other &#8220-business leaders&#8221-?

Or do you leave them in the dark? In that case, your enterprise prediction markets would be clueless, useless, and worthless.