Macroeconomics is the study of large scale economic issues such as those which affect the entire economy. This is in contrast to Microeconomics, which examines economic principles on a smaller scale. Macroeconomics is a highly practical discipline as it deals with principles that directly impact all aspects of life. Macroeconomics is a broad discipline which encompasses many distinct fields of study. The Principles of Macroeconomics can broadly be grouped into two areas on the one hand, the effects of the business cycle on the wider economy and, on the other hand, what causes the growth of an economy over a long period of time. _____By purchasing this book, you can contribute to the cost of treating children with cancer in Iran._____