[igouy]

fyi I found another primary source:

Marti, B. (1989). "Relationships between Running Injuries and Running Shoes — Results of a Study of 5,000 Participants of a 16-km Run — The May 1984 Berne Grand Prix". In Segesser, B.; Pförringer, W. (eds.). The Shoe in Sport. pp. 256–265.

https://archive.org/details/shoeinsport0000unse_r2y3/page/25...

In the 1984 Bern 16 km race questionnaire, runners who had no shoe brand preference and presumably changed brands frequently had significantly fewer running injuries. There was also some correlation between higher shoe price and increased injury. "It is probably incorrect, however, to interpret this surprising finding to mean that more expensive shoes cause more running injuries…". That group was 1 1⁄2 minutes slower than expected from their training and had a higher proportion of orthotics use. It may well be that runners with existing injuries hope that expensive shoes will fix their body.