The new empirical industrial organization (NEIO) is a pioneering framework developed by economists to measure the degree of competitiveness of economic sectors. The primary contribution of NEIO is the generalization of perfect- competition and monopoly models to intermediate imperfect-competition models that can be empirically estimated. This framework has been applied to many sectors to provide policymakers dealing with antitrust issues with empirical evidence of market power throughout the marketing channel. This is the first book to provide a detailed, systematic overview of NEIO. The authors present a comprehensive synopsis of the theory and application of NEIO as well as selected case studies to the food sector.