Economics 4th Edition New York Times columnist and Nobel laureate Paul Krugman and his co-author, Robin Wells. In this best-selling introductory etextbook, Krugman and Wells? signature storytelling style and uncanny eye for revealing real world examples help students and readers understand how economic concepts play out in our world. This new 4th edition is enhanced and revised and throughout, including a much stronger array of superior online tools that are part of an integrated and?complete online learning system. Authors: Paul Krugman, Robin Wells Publisher: Worth Publishers; 4th edition (March 30, 2015) Language: English ISBN-10: ISBN-13:.