Simplifies teaching, learning, and understanding the major growth models In the Fourth Edition, the authors have given all three of the major models (Romer, Schumpeter, and Solow) separate chapters. This allows the authors to include more context and explanation, providing a strong foundation for students as they encounter more complex concepts later in the book. Clearly covers and explains new research in the economy of ideas Recently, there has been a lot of important research into the economics of innovation and ideas. The text uses examples from this new research to explain and illustrate our increased understanding of economic growth concepts. Now available in both print and digital formats The Fourth Edition is now available as a Norton Ebook, giving students the option between print and digital. The ebook provides an active reading experience, enabling students to highlight, take notes, search, and read offline.