Economics & Markets
Why More Bidders Should Make You Bid Less
Britain's 2000 auction of five 3G licences raised about £22.5 billion, and the winners spent the decade regretting it.
2026-08-021 min read
An auction does not hand the asset to the bidder who values it most. It hands the asset to the bidder who most overestimates it. Those are different sentences, and the gap between them is where money disappears. When every bidder is guessing at the same uncertain number — how much revenue a spectrum band will throw off over twenty years — their guesses scatter around the truth. Some land too low, some too high. The auction then runs a selection process that reliably picks the highest one. Nobody has to be foolish for this to happen; the winner can be the most careful analyst in the room and still be the person whose error ran furthest in the wrong direction.
Britain's 3G spectrum auction is the textbook case. Over roughly seven weeks in the spring of 2000, five licences sold for about £22.5 billion, far beyond what the Treasury or the bidders had forecast when the process opened. Germany's auction that August raised about €50.6 billion. Both were praised at the time as triumphs of auction design, and by the seller's standard they were: the mechanism extracted very nearly everything the winners believed the licences were worth. What followed was less flattering. The winning operators carried that debt into a sector-wide collapse, and money committed at auction was money unavailable for the networks the licences existed to build.
The economists Capen, Clapp, and Campbell named this in 1971, working not on spectrum but on offshore oil leases, where companies kept winning tracts and losing money. Their conclusion was counterintuitive then and still is: the correct response to more competition is to bid less, not more. Each additional bidder raises the odds that whoever wins got there by being the most wrong.
Key insights
An auction selects for the largest overestimate, not the highest true valuation.
Britain's five 3G licences fetched about £22.5 billion in 2000; Germany's auction raised about €50.6 billion months later.
More competitors is a reason to bid lower, because each one raises the chance the winner is simply the most wrong.
Why it matters
The bid that wins is by construction the most optimistic estimate in the room, so winning is itself evidence that you may have overpaid.
The same selection effect runs through hiring, acquisitions, and competitive deals — wherever several parties price the same uncertain value, the winner is whoever liked it most.
Use this tomorrow
1Before your next competitive bid, write your walk-away price in a dated note and send it to one colleague; if the final bid exceeds it, owe that colleague a written explanation of what changed besides the competition.
2Count the rival bidders in your largest open deal, cut your estimate of the asset's value by a set amount for each one, and check whether the deal still clears — do this before the next bid round, not after.
Go deeper
Auction design and bidder welfare are different objectives, and the 3G sales optimised the first. A well-built auction is machinery for extracting a bidder's own estimate of value, so if those estimates are inflated the mechanism transmits the inflation faithfully into the price. Paul Klemperer, who advised on the UK design, later wrote at length about how the European 3G auctions diverged in outcome depending on their rules and the number of serious bidders. The lesson is not that the auction was badly built — it is that a seller's triumph and a buyer's error can be the same event seen from two sides.
The curse only bites in what economists call common-value auctions, where the asset is worth roughly the same to everyone and the disagreement is about what that amount is. A painting you love and a rival does not is a private-value auction, and winning it tells you nothing alarming. Spectrum, oil tracts, and most company acquisitions sit closer to the common-value end, which is why the pattern recurs there. Telling the two apart before you bid is the practical skill, because it determines whether winning should reassure you or worry you.
