This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Why does a firm exist at all? By the 1930s, economics had a well developed answer for how a market coordinates production: prices. A price rises when a good is scarce and falls when it is plentiful, and every buyer and seller responds to that single signal without needing to know anything else about who else is buying or selling or why. It is, in its way, an elegant answer, and it raises an odd question once you look at any real economy. Inside a company, none of that happens. A worker does not bid for a task each morning against competing colleagues; a manager simply assigns it. Materials move from one department to another by instruction, not by an internal price system settling supply against demand. If markets and prices really are the efficient way to organize production, why does so much of production happen inside firms that use commands instead? In 1937, a young British economist named Ronald Coase answered the question in an essay called The Nature of the Firm, written while he was still in his twenties. Using a market is not free, Coase pointed out. Finding the right supplier, negotiating terms, drafting and enforcing a contract, checking that the other side actually delivers what was promised: all of this costs time, effort and money, over and above the price finally agreed. Coase called these the costs of using the price mechanism, later economists shortened this to transaction costs, and his insight was that a firm exists precisely to avoid paying them over and over. Once an employer hires a worker under a general employment contract, the firm can simply direct that worker's day to day tasks without renegotiating a fresh contract for every single task, the way it would have to if it hired a different contractor from the open market each time. A firm, in Coase's account, is not a rejection of the market. It is a tool for economizing on the market's own costs, a little island of command inside an ocean of price, and it makes sense to build that island exactly where the costs of running the market are higher than the costs of simply telling someone what to do. This raised a natural next question, one Coase's own essay answered too: if commands inside a firm are so much cheaper than contracts across a market, why does a firm not simply grow to swallow the whole economy? Coase's answer was that command has its own rising costs. A manager's attention and information are limited, and every layer added to a hierarchy makes the next decision a little slower, a little more distorted, a little more prone to error, exactly the frictions the price mechanism, left to itself, does not suffer from. A firm grows, on this account, right up to the point where the cost of organizing one more transaction internally equals the cost of simply stepping back out into the market and letting a price settle it instead, and stops there. Coase returned to a closely related question more than twenty years later, in a 1960 essay called The Problem of Social Cost, that became just as influential. There he considered a different kind of friction: not the cost of organizing production inside a firm, but the cost of settling a dispute between two parties, a factory and its downstream neighbors, say, over who has the right to clean air or the right to pollute. Coase showed something that startled many economists at the time: if the two sides can bargain freely and the cost of bargaining is negligible, it does not actually matter, for efficiency's sake, which side the law hands the right to. Whoever ends up needing it more will simply buy it from the other, and the same efficient outcome results either way; the initial assignment only decides who pays whom, not what ultimately happens. This is now called the Coase theorem, and it is often mistaken for the whole of Coase's point. It was not. Coase spent most of the essay arguing the opposite case, the realistic one, where bargaining is not free: where there are many parties, where information is incomplete, where negotiating and enforcing an agreement costs real money and real time. In that far more common situation, Coase argued, the assignment of rights is not a matter of indifference at all. It becomes the whole question, because a badly assigned right, one that requires costly bargaining to correct, will simply stay in the wrong hands. Two essays, twenty-three years apart, turn out to be asking one question from two directions: what does it cost to use the market, and what follows once you take that cost seriously rather than assuming it away? Coase's own answer, in both cases, was that firms, contracts, laws and the rest of a society's institutions are not incidental scaffolding around an economy that would otherwise run itself through pure price. They exist because using a market is never actually free, and figuring out where that cost is lowest, inside a firm, across a market, or through one legal rule rather than another, is a great deal of what economics, done properly, turns out to be about.