When Too Much Information Kills the Deal: The Surplus Squeezing Effect
Achim & Lefez: "Surplus Squeeze and Informational Hold-Up" CRC Discussion Paper No. 538
Peter Achim (University of York) and Willy Lefez (HU Berlin, Project B02) introduce a novel mechanism, “surplus squeezing,” to explain why buyer-side information acquisition can lead to market collapse in static bilateral trade settings characterized by moral hazard. They study a scenario where a monopolistic seller chooses a costly quality level and a buyer may pay an upfront fee to verify that quality. Their central, counter-intuitive finding is too much information precision, rather than alleviating market inefficiencies, can destroy trade altogether through a mechanism they term surplus squeezing.
The paper rigorously demonstrates that under perfect verification, where the buyer learns the true quality exactly, no trade equilibrium exists. Once the buyer pays the sunk cost of inspection, the seller acts opportunistically, adjusting quality downward to the lowest level that still clears the buyer’s post-verification acceptance rule. By delivering quality barely above the posted price, the seller successfully captures nearly the entire surplus the buyer hoped to secure through verification. Anticipating this complete surplus extraction, the buyer refuses to pay the verification fee, leading to a complete breakdown of quality provision and trade. This mirrors classic hold-up problems, but the sunk investment is informational rather than physical capital.
Crucially, the authors show that trade can be sustained only when verification is noisy. The presence of uncertainty prevents the seller from perfectly anticipating the buyer’s posterior belief, making perfect surplus squeezing too risky. This limits the seller’s opportunism and forces them to leave a positive expected net surplus for the buyer, justifying the inspection cost. The researchers conclude that trade is possible only in a “Goldilocks zone” of moderate precision: if the signal is too imprecise, the buyer gains too little to justify the cost; if it is too precise, the surplus squeezing effect returns, deterring inspection and unravelling the market. This framework extends classical moral hazard models by endogenizing the buyer’s information choice and offers a cautionary lesson: absolute transparency can backfire when the informed party can strategically respond to learning.
Link (pdf): Surplus Squeeze and Informational Hold-Up
