Original research on the press release — how it is published and who can read it — measured on PPN World's live archive of the world's releases. Every study publishes its method, its uncertainty and its data, free to reuse with a credit.
The papers draw on PPN World's archive, which collects press releases from 1,400+ publisher feeds as they are published.
We read the robots.txt file behind every one of 500,129 press releases. 94.0% of them are open to every AI crawler we tested. Where a publisher does refuse, it refuses to train AI — not to be quoted by it.
The Research Center publishes original, pre-registered studies of the press release, measured on PPN World's archive, with every method, dataset and correction in the open. Its papers are written by Émile Bolduc.
Every figure is computed from a dated, committed snapshot, so a number you cite is still true tomorrow. A new edition is a new snapshot, announced as such.
Uncertainty is shown
Rates carry 95% intervals; cases we could not determine are counted and reported, never quietly dropped or quietly counted.
Robustness before headlines
A finding is tested against the obvious objection — a different mix of publishers, one dominant source, how it is averaged — before it is written down.
No gate
No email, no sign-up, no sales call between you and the numbers.
CC BY 4.0
Republish, redraw and remix, commercially or not — credit PPN World and link to the study.
Corrections are published with their date
We do not silently edit a page someone has cited.
For journalists and researchers
Quote any figure with a link to its study; each paper carries ready-made APA, MLA, Chicago and BibTeX references, a PDF and its dataset as a CSV. For a cut of the data we have not published, a question about method, or an interview, write to us.
By Émile Bolduc