Baumol's cost disease
Baumol effect
Wages rise in sectors with no productivity growth because they must compete for labor with sectors that have it. A string quartet needs the same four people it needed in 1800, and costs far more, without anyone being less efficient.
In practice
Your delivery costs rise every year while the hours per project do not fall, because you compete for the same people as firms whose output per hour is climbing.
The common mistake
Reading rising costs as inefficiency in the business. The mechanism is external — it is the wage level set by other sectors — and cutting internally does not address it.
William Baumol and William Bowen noticed the problem in the performing arts in the 1960s, and it generalizes to most of what a service business does.
A string quartet in 1800 required four musicians for forty minutes. In 2020 it requires four musicians for forty minutes. Productivity in string quartets has not changed in two centuries.
Yet musicians cost vastly more than they did, in real terms. They have to, because they could be doing something else, and the something else has become far more productive. Wages across an economy are set by the alternatives available to workers, not by the productivity of the job they are in.
So sectors without productivity growth face rising costs caused entirely by sectors that have it.
Why this matters to a service business
Professional services have weak productivity growth by nature. An hour of skilled judgment is an hour, and tools improve the surrounding work more than the judgment itself. Meanwhile the people you employ can go to firms where output per person is genuinely rising, and their pay rises there.
The consequences are structural rather than managerial.
Costs rise regardless of how well you run the business. This is not inefficiency and it will not respond to cost control.
Prices must rise too, or margin disappears. A service firm that does not raise rates annually is losing ground by default. This is the arithmetic beneath raising your rates being maintenance rather than ambition.
The escape is changing what you sell. Productization, tooling, licensing — anything that breaks the link between an hour delivered and value delivered moves you into the sector with productivity growth rather than the one paying for it.
The wider version
It explains why education, healthcare, live performance and craft trades get relatively more expensive decade after decade, in every developed economy, while manufactured goods get cheaper. Nothing is going wrong in those sectors. They are paying the wage bill set by sectors where machines did the improving.
Concept web
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What is Baumol's cost disease?
The rise in costs in sectors without productivity growth, caused by their need to pay wages competitive with sectors that have it. A string quartet needs the same four musicians it always did and costs far more.
Why do service businesses face rising costs?
Because an hour of skilled judgment remains an hour while the people delivering it could work in sectors where output per person is rising. Wages are set by the alternatives available to workers rather than by the job's own productivity.
How do you escape Baumol's cost disease?
By breaking the link between hours delivered and value delivered — productizing, building tooling, or licensing — which moves the business into the sector with productivity growth rather than the one paying for it.