Lesson 2 of 7
Drawing a theory that resisted models
Garrison set the theory beside Keynesian, monetarist and new classical accounts in one graphical apparatus. What became explicit, and what a diagram costs.
By Javier Sanz
Founder of ValueScreener. Built Ninety Nine, a securities services provider, and sold it to a tier-one global bank; ran operations and internationalization at Alpaca, the brokerage API.
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In one minute
- Garrison's move is comparative: put the Austrian account next to its rivals and show that the difference is a theory of capital rather than a different view of money.
- What became explicit is the claim that other schools do macroeconomics without capital theory, and that this is a choice with consequences.
- What it costs is the thing the tradition warns about elsewhere: a diagram needs aggregates, and aggregating is what this school says hides the interesting variation.
For most of a century this theory was written in prose. Roger Garrison's work from the late 1980s onward set it out as a connected graphical apparatus, and the article this lesson uses was written as a reply to a published critic.
Where each school locates the cycle
The account he defends
- Money enters through credit markets, so it hits the interest rate first.
- The interest rate governs the allocation of capital across time.
- Capital goods are commitments to particular time profiles.
- The cycle is a self-reversing misallocation across those profiles.
What he says the rivals do instead
- Keynes rejected the capital theory and offered no replacement.
- Monetarism took a capital theory in which production and consumption are not temporally distinct.
- New classical work models intertemporal labour allocation but not capital.
- So each proceeds with macroeconomics in the absence of capital theory.
On this account the disagreement is about capital theory, not about whether money matters.
What the formalisation made explicit
Three things, on the evidence of the article itself.
The first is the claim about where money enters. New money reaches the economy through credit markets rather than falling on cash balances at random, so its first effect is on the rate that governs the allocation of capital, not on every price at once. Stated that way, it is a testable difference from the textbook assumption rather than a matter of emphasis.
The second is the reason for the focus on capital goods industries. The temporal dimension of capital is what creates the interval in which a misallocation can happen and after which it must be undone, which is a claim about why one part of the economy swings hardest.
The third is the comparison itself. Once the accounts are drawn in one framework, the question of what each school does in place of capital theory can be asked directly, and Garrison notices something generous about a rival: that the time-to-build assumption in the real business cycle literature was introduced to fix a mismatch between theory and evidence and could lead back toward capital theory.
What it costs
The tradition's objection to mainstream macroeconomics has always partly been about aggregation: that adding up heterogeneous capital into a single quantity hides exactly the structure that matters. A graphical apparatus has to draw axes, and axes are aggregates.
Garrison's own framing shows the tension. He writes that there is no canonical version of the theory and can be none, because the cycle is a live question inside the school as well as outside it, and he presents the article as one organisation of the material rather than as the statement of it.
A reader can hold both things. The formalisation made the theory arguable in the language the rest of the profession uses, which is how it got answered at all. It also made it look more settled and more aggregated than its own authors claim it is.
Why this lesson is placed here
Because the honest version of the school's current state includes the fact that its best-known modern statement is a translation. Comparisons in one framework are how a heterodox account enters a conversation, and they always cost something in fidelity.
The same applies in reverse: when a mainstream account is summarised in this track, it is being translated too, and the next course exists to do that carefully.
Check yourself
What does Garrison say the difference between the schools comes down to?
- Whether money affects real variables
- Whether macroeconomic analysis includes a theory of capital
- Whether expectations are rational
Show the answer
Answer: B.
His article argues each rival proceeds without capital theory, and that the Austrian focus on capital markets is what distinguishes the account.What claim about money does the formalisation make explicit?
- That the quantity of money is irrelevant
- That new money enters through credit markets, so it affects the interest rate before it affects prices generally
- That money is neutral in the long run
Show the answer
Answer: B.
He contrasts this with the assumption that new money is added to cash balances directly, and treats it as giving the theory stronger empirical content.What does a graphical apparatus cost this theory?
- Nothing, since the theory was always formal
- Aggregation, which is the thing the tradition says hides the structure it cares about
- Its account of money
Show the answer
Answer: B.
Drawing axes means adding up heterogeneous capital, and the school's own objection to mainstream macroeconomics is partly that this conceals the variation that matters.Sources
- Garrison, 'The Austrian Theory of the Business Cycle in the Light of Modern Macroeconomics', Review of Austrian Economics, volume three, sections two to four: the claim that new money enters through credit markets and affects the interest rate first, the temporal dimension of capital as the interval in which misallocation occurs, the treatment of Keynesian, monetarist and new classical accounts as proceeding without capital theory, and the observation about time-to-build in the real business cycle literature. The article opens by saying there is no canonical version of the theory and can be none.
What this leaves out
- This is a heterodox tradition. The mainstream account of the same phenomenon differs, and nothing here is a forecast or a view on any security.
- The characterisations of Keynesian, monetarist and new classical work in this lesson are Garrison's. Each of those schools is set out in its own words in the next course of this track.
- Garrison's later book-length treatment was not obtained for this course, so nothing here is claimed about it. The article used is his own comparative statement from the same period.