This paper gives data showing that 38 is not too old: http://news.ycombinator.co...

jcl · on July 17, 2008

Part of the problem may be that the article is a pdf, and you have to create an account to read it.

michael_nielsen · on July 17, 2008

I didn't need an account to read it. A direct link is here: http://papers.ssrn.com/sol3/Delivery.cfm/SSRN_ID1127877_code...

jcl · on July 17, 2008

Oops... my cookies were messed up; I managed to download the article. I note, though, that the link you provided isn't a direct link. They must be checking referrer to discourage direct links... Annoying!