How the world works
Ronald Coase
Transaction costs
Ronald Coase (Britain · 1910–2013) — Transaction costs.
What actually happened?
By Coase's own later account, in 1960 he sat in Aaron Director's house in Chicago with a roomful of economists pressing him on the paper he had just written about social cost. By the standard teaching of the day, if a person's activity harms others, you restrain him or tax him; it was close to common sense. Coase took the objections one at a time. By the end of the evening, he recalled, nobody in the room was still arguing.
Dealing is not free
The price is only the part of the cost that shows. Finding the seller, asking prices, agreeing terms, writing the contract and checking delivery all cost something. He called it the cost of using the price mechanism; it was later named transaction cost.
A photographer quoted at five hundred pounds: three days comparing, two rounds of briefing, and chasing the files at the end.
A firm stops where the two costs meet
He explained why firms exist: directing people inside is cheaper than bargaining outside. A firm grows until organising one more thing inside costs as much as doing it on the open market.
A support team grows from three to thirty; rotas and training get dearer until outsourcing becomes the cheaper line.
The harm is made by two parties
In 1960 he argued that to spare B you must harm A. The confectioner's mortar harmed no one until the doctor built his room. What has to be weighed is which loss is the heavier.
A food stall keeps the neighbours awake; closing it takes the owner's living.
Bargaining must be affordable first
In a world where bargaining is free, the two sides settle on their own. In the real world finding each other, haggling and enforcing the deal all cost money, which is why who holds the right at the start matters.
Two households can settle a shared lane. A hundred on one street cannot, and need a rule first.
How do I use it today?
Pick something you are weighing: build it yourself or buy it in. On a sheet, write on the left what the outside route costs you in finding, haggling and checking, and on the right what each extra person adds in meetings, coordination and waiting for approval. Do not stop at the quote and the salary; both are already written down. If you are stuck in a dispute where two things get in each other's way, make two columns as well: what it costs him if he stops, what it costs me if I carry on, and whether there is an arrangement that leaves both better off.
Deep read
Read alongside
Further
Lines to keep
Buying through the market is not free.
A firm grows until managing one more thing costs more than buying it.
We are dealing with a problem of a reciprocal nature.
The problem is to avoid the more serious harm.