Economist Quotes and aphorisms about challenges Fatih Birol Arancha Gonzalez George Stigler David Malpass ,, While Washington pays lip service to the challenges facing small businesses, it repeatedly chooses ... Evan Davis Gus O'Donnell Edmund Phelps David Autor ,, There's always new work to do. Adjusting to the rapid pace of technological change creates real cha... Mark Skousen Klaus Schwab