Macroeconomics and microeconomics are the two levels of economic analysis required to understand the multitude of economic problems that confront our nation and the world. Macroeconomics looks at the economy as a whole and is mainly concerned with avoiding or minimizing periods of recession and inflation by employing counter-cyclical monetary and fiscal policy. Microeconomics analyzes the behavior and decision-making of the individual economic units--households and business firms--and focuses on how a market-directed economy answers the three fundamental questions of what, how, and for whom to produce.
Since economists have the valued talent of recognizing and understanding the chain of cause-and-effect relationships between many economic variables at once, all types of employers from the private (business), public (government), and international (multinational corporations and international institutions) sectors seek their services.
An excellent source of information about the field of Economics is the website of the American Economic Association.