      So, what is the GNP? The GNP is the sum total of all goods andservices produced by the United States. This can also be stated as ameasure of supply and demand for goods and services produced in the UnitedStates. Because the expansion or contraction of the economy is based on thesupply of and demand for goods and services, this indicator providesvaluable insight as to the direction the U.S. economy is moving. Becausethe growth of most companies is directly related to overall supply anddemand, the GNP is an excellent predictor of future economic conditions.