The Usefulness of US Transportation Service Index for New York State/Metro Area
Business indices play a c r i tical role in summarizing the business conditions of the economy and
indicating the forthcoming of phase changes in business cycle. The useful indices should accurately reflect
the business reality and dynamic changes of the economy. In the pas t decades , signi ficant indus t ry
t ransformation from manufacturing to services has been observed in both New York State/Metro area and the
ent i re nation. The share of goods in US GDP has declined from 54% to 35% and the share of services has