Council for Economic Education
Econ Ed Link: Where Does the Money Come From?
With very few exceptions, the U.S. federal government does not have an "income" to spend providing goods and services. The money used for federal spending programs must be collected as federal taxes, or it must be borrowed. This lesson...
Khan Academy
Khan Academy: Shifts in Aggregate Demand
Aggregate demand is made up of four components: consumption spending, investment spending, government spending, and spending on exports minus imports. Increasing or decreasing any of these components create shifts the AD curve.