Act 1 · The Problem · Station 03
The statistics filter
Heterogeneous things get lumped together on the way to the center — decide from the aggregate, then see what the detail would have told you.
A central authority cannot act on twelve lots of timber directly — it acts on a report about them. Hayek's point in §IV is that the report is not a smaller version of the truth; it is a different kind of thing, built by discarding exactly the differences a decision might turn on. Below is one small warehouse's worth of timber, both ways.
That is the whole report. Twelve lots, lumped together "as resources of one kind" — species, location, quality, and timing all abstracted away.
Decision: fill an urgent order for seasoned oak near the river — which lot?
Unanswerable from here. The total tells you there is timber; it cannot tell you which of it is oak, which is seasoned, or which is near a river.
“The statistics which such a central authority would have to use would have to be arrived at precisely by abstracting from minor differences between the things, by lumping together, as resources of one kind, items which differ as regards location, quality, and other particulars, in a way which may be very significant for the specific decision.” Hayek 1945, §IV (p. 524)
Even the total itself is not as stable as it looks. The 406 tons above sit still only because someone keeps making it look that way — the aggregate is an outcome of constant local adjustment, not a fact that holds on its own.
“The continuous flow of goods and services is maintained by constant deliberate adjustments, by new dispositions made every day in the light of circumstances not known the day before, by B stepping in at once when A fails to deliver.” Hayek 1945, §IV (p. 524)
Stop the B-steps-in-for-A adjustments and the aggregate would not sit calmly at 406 tons — it would drift, because what looked like one stable number was always twelve unstable particulars, quietly rebalanced by people who could see them.