The book has evolved over the years as the world has significantly changed, so as to deal with the real life issues besetting mankind. Over this period, the book has remained as the standard textbook for teaching elementary economics worldwide. The book is now in its sixteenth edition to reflect its continued popularity and utility.
The book maintains some basic Keynesian and classical economics models and has included later generation economic science concepts including monetarism, rational expectations and supply side economics. The book has kept pace with such diverse subjects as environmental issues, health care issues and opportunity cost of a college education and the latest developments in the information communication technology.