Public Goods and Free Riding: Why Markets Fail When Everyone Benefits

You wake before dawn on November 27, 1703, to the sound of your factor hammering at your door in Bristol. Three of your merchant vessels were running the Channel last night. The Great Storm, the worst to strike England in recorded memory, has been tearing across the southern coast since midnight. By the time it passes, it will sink an estimated 700 ships and kill more than 8,000 sailors. You do not yet know your ships' fates.

In the weeks that follow, as the wreck tallies come in, a consortium of Bristol and London merchants begins circulating a proposal. They want to fund a lighthouse cooperative: a permanent light on the Eddystone Rocks off Plymouth, one of the most treacherous navigational hazards in the Channel. The engineering is feasible. Henry Winstanley has already drawn plans. The total cost is substantial but not ruinous, and if split among forty contributing merchants, each share is manageable.

You are handed the subscription paper. Your name would commit you to £200, payable in three installments.

Here is what you know: every ship that sails the western Channel will benefit from that light, whether its owner contributed a farthing or not. The light cannot be switched off for non-paying vessels. A French privateer, a rival merchant, a fishing smack from Brittany, a Royal Navy frigate whose captain never heard of your cooperative, all of them will navigate more safely past Eddystone if the lighthouse stands. You cannot charge them. You cannot exclude them.

You also know that thirty-nine other merchants are holding the same subscription paper and doing the same arithmetic.

Do you sign?

The pull toward signing is real: your ships nearly died out there, and £200 feels cheap against the loss of a vessel worth ten times that. But the pull toward waiting is equally real, and it has nothing to do with greed. It has to do with logic.