"In the U.S. and many other countries, the too-big-to-fail banks have become even bigger," Nobel Prize-winning economist Joseph Stiglitz said in an interview today in Paris. Stiglitz leveled his criticism directly at the Obama administration for not placing stricter limits on the largest institutions or requiring them to simplify their structure. "The problems are worse than they were in 2007 before the crisis." The statements come on the anniversary of the collapse of Lehman Brothers. "We aren’t doing anything significant so far, and the banks are pushing back," he said.