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http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.848.3904&rep=rep1&type=pdf

http://hassler-j.iies.su.se/courses/Riksbank/Papper/Prescott2004.pdf

https://www.researchgate.net/profile/Jeremy_Reynolds2/publication/226076977_When_Too_Much_Is_Not_Enough_Actual_and_Preferred_Work_Hours_in_the_United_States_and_Abroad/links/0f31753710f309136e000000.pdf

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