When economists are trying to understand the economics of growth, they usually go by the numbers. Yet, not only don’t the numbers always add up, they also lack the dimension and context needed to solve some of the world’s most perplexing problems. That is the view of  Morton Schapiro, an economist who is also president of Northwestern University, and  Gary Saul Morson, a professor of Slavic languages and literature there. In this interview, they make the case for a broader perspective as presented in their book, Cents and Sensibility: What Economics Can Learn From The Humanities . The authors argue that economists need to consider culture, art, history and a host of other disciplines when formulating economic policy, in this Knowledge at Wharton radio show interview on  SiriusXM channel 111 . (Listen to the full podcast using the player above.)  Following is an edited transcript of the conversation. Knowledge at Wharton: What is the idea behind this book?…