Idk what a hedonic multiplier is, but my understanding of that article is that production numbers measure the real $ value of output, not the actual quantity, making the production index misleading (e.g., if the US manufactured totally stopped except to make 1 computer chip costing $100 trillion, then manufacturing would seem to shoot up, even as it actually collapsed.)

If that's correct, then it's interesting: we're making few, valuable items now, rather than many, cheap items. It follows that automation isn't a drive towards cheaper production, but more a drive towards higher quality goods that simply require machines to make.

But it all takes me back to my point: from a geopolitical perspective, being good at highly-differentiated, tech-intensive, difficult-to-execute manufacturing is a great position. It's just a disaster from an employment perspective, because to get there, we traded away all our labor-intensive manufacturing.