Book excerpt: Economists working on behavioral economics have been awarded the Nobel Prize four times in recent years. This book explores this innovative area and in particular focuses on the work of Harvey Leibenstein, one of the pioneers of the discipline. The topics covered in the book include agency theory; dynamic efficiency; evolutionary economics; X-efficiency; the effect of emotions, specifically affect on decision-making; market pricing; experimental economics; human resource management; the Carnegie School, and intra-industry efficiency in less developed countries.