How a Fake Country Fooled the Big Banks

As an emerging markets investor in 19th century South America, it was tough to find out what was really happening. At best, up-to-date news had a three month journey. Even with good winds, the round trip between London and South…

Computer Models: Questions for Mathematicians and Economists

Reading about the 4-color theorem for maps, I realized it was about a lot more than math. My story starts with an recent obituary about one of the mathematicians, Kenneth Appel, who first proved the 4-color theorem. Completing a quest…