Nassim Taleb and Nouriel Roubini predicted the last collapse. But even they don't think that means they'll be able to predict the next one. Paul Solman frequently answers questions from the NewsHour audience on business and economic news on…

Monday was a busy day in Charlotte, N.C., the eve of the start of the Democratic National Convention. There was the Charlotte Labor Day Parade, CarolinaFest and final preparations at the Time Warner Cable Arena, where first lady Michelle Obama…