An episode of Marketplace this week highlighted a recent survey showing a strong majority of people preferring 4x10 rather than 5x8. It's unclear why it isn't more common.

Because most of the people of a high enough pay-grade to have any bargaining power are already working 5x10, or more.

I work 4x10 and keep a timesheet; any time I work over I take back at some point in time. Planning on decreasing the hours slightly soon, drop back to 38 or whatever the norm is here in Australia.

I don't find that 10 hours fatigues me, it feels the same as an eight hour day anyway.

I think you're a big outlier, or at least you would be in the US. I have no idea what work culture is like in Australia, but it stands to reason it would be better than here.

US working hours are nuts, IMO.

Was this a US specific survey? 10h of work, 1+h of break, and at least 1h of commute means you leave home at 8 in the morning and come back after 8 in the evening. I doubt this would be very popular in Europe with anybody in a non-managerial position or at least very high on the pay grade. But it sort of makes sense because it improves the ratio of productive time (work) to unproductive time (the commute), and results in getting a full extra free day.

On the other hand it's possible that a 10h work day becomes less productive than an 8h one if applied long term. Of course it depends on the actual job but it wouldn't leave much time for anything personal. For a lot of jobs 10h shifts sounds like looking for trouble.

I was pretty great when working a blue-collar industrial job. I'd work 6:30-5 (unpaid half hour lunch) monday-thursday one week, then tuesday-friday the next. So you'd get a four-day weekend every other week, and if there was extra work, you'd get time-and-a-half for it. A ten hour day wasn't bad, because you went until 9, had a half hour break, went to noon, ate lunch, went until 3 and had another break, then closed out the day until 5. It was almost an extended pomodoro.

Even now, programming on salary, I'd rather do 4 tens, 7-5. The overhead of commuting is what kills me, and it'd actually be less traffic if I went in earlier. Besides, those two hours before everybody else gets there could be more productive than the whole rest of the day.

> The overhead of commuting is what kills me

Even a short commute just kills me. This is why WFH is so effective IMO. Up between 5am and 6am. Workout, then work. Those few hours in the morning before anyone else gets in is when I do most of my 'work' for the day. The rest of the day is meetings, answering questions, etc...

Her in Norway most people work 37.5 hours (40 hours present with an unpaid half hour lunch break). And if you are salaried then you can pretty much come and go as you please. I read somewhere (VG perhaps) that about 100k people work a four day week (same total time) here (out of a total 5.5 million population). It's especially attractive for people who have a long or stressful commute.

> It's unclear why it isn't more common.

Because many companies are already getting 5x10 out of their salaried employees. They don't want to lose that extra work.

The calculation was back of the napkin of course, and worst case scenario. But it never implied all people and professions are the same (that's not how statistics work), or that weekly productivity varies with hours worked. Rather with days worked. A day is a fully self-contained unit of work/life so to speak: it contains the commute, the breaks, the work, the recovery time (sleep), etc. This makes it a much more relevant unit of measure.

8 hour days are probably a good balance between how much work you can productively put in during one day and the auxiliary time. Increasing the number of hours per day would probably decrease productivity via fatigue. Decreasing the hours wouldn't bring much of a benefit for the worker since the auxiliary time stays mostly the same (you still commute).

A good chunk of the lost productivity would probably be offset by higher worker satisfaction.