New Theory Challenges The Economic Value Of Secrecy
Standard economic theory suggests that holding private information secures a better deal, but for people with realistic, non-standard preferences, complex contracts can strip that advantage away.
In the world of negotiation and economics, keeping secrets usually pays off. Whether you are buying a used car or negotiating a salary, if the other party doesn't know your true valuation or willingness to pay they typically have to offer you a better price to ensure the deal goes through. Economists call this benefit "information rent": the extra value you keep because of your private information.
However, new research by Ernesto Rivera Mora and Philipp Strack suggests this advantage is far more fragile than previously thought. The authors revisit the foundations of "mechanism design"—the science of creating rules, like auctions or contracts, to achieve specific outcomes.
Standard theory relies on the "Revelation Principle," which asserts that simple, direct contracts are sufficient to capture all possible economic outcomes. But this principle hinges on the assumption that people are "Expected Utility" maximizers—perfectly rational actors whose preferences follow strict mathematical consistency. Mora and Strack show that if people deviate even slightly from this ideal—displaying common traits like loss aversion or a specific dislike of randomness—the rules of the game change entirely.
When dealing with these more realistic agents, a seller can use dynamic, multi-stage tactics to exploit the buyer's preferences. Instead of a simple straightforward price, the seller offers a sequence of choices involving potential lotteries or delays. By leveraging the buyer's aversion to uncertainty or complex risks, the seller can effectively back the buyer into a corner where they reveal their true value without receiving additional utility.
"Screening allows the designer to construct new implementable allocations by letting agents self-select between existing ones, while randomization ensures the set of implementable allocations is a convex set. Our approach characterizes the set of all implementable allocations as the smallest fixed point of this operator, allowing a complete analysis without needing to explicitly construct the stochastic dynamic mechanisms needed for implementation."
The implication is stark: under these conditions, the seller can extract the entire surplus of the trade, driving the buyer's "information rent" to zero. The finding challenges the long-held economic belief that private information is inherently valuable, suggesting instead that your ability to profit from secrets depends heavily on how "rational" your decision-making style really is.