In Economic Logic , Mark Skousen offers a step-by-step approach to economics showing how microeconomics and macroeconomics are logically linked together. The fully revised sixth edition introduces a major breakthrough in macroeconomics: a "top line" in national income accounting called Gross Output. Also included: a powerful four-stage universal model of the economy, a new "growth" diagram, a new diagram of the optimal size of government, and new alternatives to the standard Aggregate Supply and Aggregate Demand curves. Economic Logic is also the first and only textbook to begin with a profit-and-loss income statement to demonstrate the dynamics of the economy. To aid students in comprehending the economic lessons, many other disciplines are integrated into the study of economics, including finance, business, marketing, management, history, and sociology.