these are obvious when you know them / its easy to labor under inferior unexamined theories when you dont
― ice cr?m, Monday, 20 December 2010 22:33 (fifteen years ago)
http://en.wikipedia.org/wiki/Opportunity_cost
― ice cr?m, Monday, 20 December 2010 22:34 (fifteen years ago)
http://en.wikipedia.org/wiki/Sunk_costs
http://en.wikipedia.org/wiki/Marginal_cost
the time value of money
― sarahel, Monday, 20 December 2010 22:36 (fifteen years ago)