The Seventh Edition welcomes a new co-author, Stephen Erfle of Dickinson College, who has contributed many revisions and improvements to the quantitative sections of the text, as well as provided a major addition:  the use of Excel in the presentation of many of the numerical and graphical illustrations presented throughout the text.  

To strengthen readers’ ability to use Excel―a critical skill in today’s job market–new Excel Applications (Excel Apps) allow readers to turn the static figures and tables in the text into dynamic illustrations.