U.S. EPA proposed a reduction in the biofuel mandate, but is reportedly considering walking back a bit on the decision. Lending credence to that outcome is how the issue has evolved in Europe. Fuzzy Economics French economist Thomas Piketty has taken America by storm and upset capitalists with his charge that their approach is worse for the nation than the socialism he espouses. The Wall Street Journal points out that his new book, "Capital in the 21st Century," is a hit with liberals in America, but is largely ignored in his native France where its premise is de rigueur. Market economist Martin Feldstein charged that Piketty has assumed a false theory, uses wrong data and that the problem is poverty, not low taxes. After all, France has...