Editing Daylight saving time (section)

===Economic effects===
It has been argued that clock shifts correlate with decreased [[economic efficiency]] and that in 2000, the daylight-saving effect implied an estimated one-day loss of $31 billion on US stock exchanges.<ref>{{cite journal|author1=Mark J. Kamstra|author2=Lisa A. Kramer|author3=Maurice D. Levi|year=2000|title=Losing sleep at the market: the daylight saving anomaly|url=http://homes.chass.utoronto.ca/~lkramer/aer-daylightsaving-reply.pdf|journal=American Economic Review|volume=90|issue=4|pages=1005–1011|citeseerx=10.1.1.714.2833|doi=10.1257/aer.90.4.1005|access-date=27 October 2017|archive-date=21 September 2017|archive-url=https://web.archive.org/web/20170921234625/http://homes.chass.utoronto.ca/~lkramer/aer-daylightsaving-reply.pdf|url-status=live}}</ref> Others have asserted that the observed results depend on methodology<ref>{{cite journal|author1=Luisa Müller|author2=Dirk Schiereck|author3=Marc W. Simpson|author4=Christian Voigt|year=2009|title=Daylight saving effect|journal=Journal of Multinational Financial Management|volume=19|issue=2|pages=127–138|doi=10.1016/j.mulfin.2008.09.001}}</ref> and disputed the findings,<ref>{{cite journal|author=Michael J. Pinegar|year=2002|title=Losing sleep at the market: Comment|journal=American Economic Review|volume=92|issue=4|pages=1251–1256|doi=10.1257/00028280260344786|jstor=3083313|s2cid=16002134}}</ref> though the original authors have refuted points raised by disputers.<ref>{{cite journal|author1=Mark J. Kamstra|author2=Lisa A. Kramer|author3=Maurice D. Levi|year=2002|title=Losing sleep at the market: the daylight saving anomaly: Reply|journal=American Economic Review|volume=92|issue=4|pages=1257–1263|doi=10.1257/00028280260344795|jstor=3083314}}</ref>