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Robbing Delivery Robots Is Now a Thing
(www.autoweek.com)
This is a most excellent place for technology news and articles.
No, as these are the numbers reported by worker's themselves (Robert Whaples's research) and not by their disparate employers. But looking at it as you suggested, it comes out to 34.3 hours.
Here are two more views on it:
https://ourworldindata.org/working-more-than-ever (world trends)
https://www.stlouisfed.org/publications/regional-economist/january-2007/working-hard-or-hardly-working-the-evolution-of-leisure-in-the-united-states [dated]
Lol? What you just said doesn't disprove what I said. If people work multiple jobs their hours will be lower. Nothing in your studies you presented said people only work 1 job. Just that the hours at any given job are only 30ish hours. Still doesn't talk about people working more than 1 job.