There is an interesting article about productivity vs. hours worked here: http://www.alternet.org/story/154518/why_we_have_to_go_back_to_a_40-hour_work_week_to_

There is an interesting article about productivity vs. hours worked here: http://www.alternet.org/story/154518/why_we_have_to_go_back_to_a_40-hour_work_week_to_keep_our_sanity?paging=off http://www.alternet.org/story/154518/why_we_have_to_go_back_... The thesis (IIRC) is that 40 hours a week is optimal from a productivity point of view.