Isn't coordinated price setting across a wide range of interchangeable commodities with elastic demand curves a particularly efficient form of price discovery?

Isn't coordinated price setting across a wide range of interchangeable commodities with elastic demand curves a particularly efficient form of price discovery? What would be a better mechanism of price discovery for such a group of commodities? I have never viewed an ad match policy with suspicion. Real assets, on the other hand... Love the data collection project, suspect the foregone conclusion. If we're so convinced already, data may not change anything.