It’s national bracket day, and as usual, college basketball fans are busy choosing which of the now 68 teams will make it to the Final Four. It’s estimated the NCAA Men’s Basketball Tournament will lead to 8.4 million hours of lost worker productivity this season. We talk with Tobias Moskowitz and Jon Wertheim, co-authors of the book, “Corecasting: The Hidden Influences Behind How Sports Are Played and Games Are Won.” Moskowitz and Wertheim give their tips for how you should – and shouldn’t – go about filling in your brackets.