Research
Signals worth your attention.
A closer look at prices, markets and buying decisions.
Research paper · 25 Oct 2026
AEPI and equity markets, re-run on the corrected index.
On the corrected AEPI, price changes do not predict equity returns, and none of the earlier findings reproduce. The August and October studies are withdrawn.
Read the paper ↗Market note · 3 min
The average hides the market.
The headline barely moves. Individual markets can tell a very different story.
Read more ↗Pricing guide · 3 min
A cheap number is not the whole price.
The plan, billing unit and commitment matter as much as the amount.
Read more ↗Reading the data · 2 min
When one change moves a whole market.
A sector index can be useful without every product in it changing price.
Read more ↗Worked example · 2 min
From a support task to a shortlist.
A simple buying journey: find, inspect and compare.
Read more ↗Withdrawn papers
These used an earlier AEPI calculation that was later found to be incorrect. Kept for the record only.
Take the data into your own research.
Read the indices and compare prices from an assistant or your own application.
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