Microeconomics Principles Applications and Tools - 5th Edition - MyEconLab Series Author:Arthur O'Sullivan, Steven Sheffrin, Steve Perez The book provides a clear, concise, and accessible presentation of key points. Its hallmark feature includes a focus on the 5 Key Principles of Economics–1) Opportunity Cost, 2) The Marginal Principle (comparing marginal benefits and marginal costs), 3) Diminishing Returns, 4) The Spillover Principle (for externalities in p... more »roduction and consumption), 5) The Reality Principle (distinguishing real from nominal magnitudes). For financial professionals and analysts.« less