I read a study where they found that overtime gives better results for a few weeks, then people become exhausted and LESS productive than the typical 8h/day worker.
I also remember another study showing that after a certain amount of overtime in a day, your brain works at the same capacity as if mildly inebriated.
Sorry, no links, but both should be available online.
I've seen almost no good data on this, but a few suggestions that (at least in construction), the extra hours worked compensate for the lower productivity. You get more done in 60 hours than 40, which certainly fits my experience.
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I read a study where they found that overtime gives better results for a few weeks, then people become exhausted and LESS productive than the typical 8h/day worker.
I also remember another study showing that after a certain amount of overtime in a day, your brain works at the same capacity as if mildly inebriated.
Sorry, no links, but both should be available online.
I've seen almost no good data on this, but a few suggestions that (at least in construction), the extra hours worked compensate for the lower productivity. You get more done in 60 hours than 40, which certainly fits my experience.
http://www.overcomingbias.com/2011/12/construction-peak-60hr...
This paper (paywall, sorry) suggests a 10% increase in time worked only reduces productivity by 2.4% (in manufacturing).
http://www.emeraldinsight.com/journals.htm?articleid=848285&...
The little empirical evidence I've seen suggests the OP will produce more if she works more. This certainly fits my experience.
But if anyone has good data sources on knowledge workers, I'd love to see it. There isn't actually much good data out there.
Here's an article about that, "Bring back the 40-hour work week": http://www.salon.com/2012/03/14/bring_back_the_40_hour_work_...