The Oxford Handbook of Judaism and Economics (page 435, footnote 50, available on Google Books preview here) refers to a comment in the Shiltei ha-Gibborim. The only precise reference is "note 3 on Mordekhai 475". I have no clue how to find this or look it up. Can anyone help?
In the standard edition of Mordechai (in the back of many volumes of Shas) there are paragraph marks in bold, which are continuous throughout each seder, as in this example:
So paragraph 475 (תעה) is in Bava Basra, and the Shiltei Hagiborim being referenced is at the foot of the page (the next page, in this case). Here's the link.