books.google.com - In this, the most comprehensive analysis of the American public's knowledge of politics ever written, Michael Delli Carpini and Scott Keeter explore how levels of knowledge have changed over the past fifty years, how knowledge is distributed among different groups, and how it is used in political decision-making....http://books.google.com/books/about/What_Americans_Know_About_Politics_and_W.html?id=b2ZUquOLrzoC&utm_source=gb-gplus-shareWhat Americans Know About Politics and Why It Matters