 Its two major cities, Hartford and Springfield, have a combined GDP exceeding $100 billion per year, more than 16 U.S. States.This figure does not include the smaller cities and towns of the "Knowledge Corridor", (e.g., Northampton, Massachusetts and Middletown, Connecticut) but only the two principal cities.As of its tenth anniversary in 2010, the Knowledge Corridor Partnership has been cited for both increasing jobs and keeping jobs in the Hartford–Springfield region, e.g.