Reading poster scan data without fooling yourself
Poster scan data is easy to misread. Which comparisons are fair, why totals lie, how big a sample you need, and what to do when two spots look identical.
Where to put up posters so they get seen
How to choose where to put up posters — the spots that reliably work, the ones that look good and do nothing, and how to tell which is which on your streets.
How to put a QR code on a poster that people scan
A practical guide to putting a QR code on a poster — the size that scans, where it goes, what to write beside it, and how to know afterwards whether it worked.