All descriptions of Central Jersey include Middlesex County, the center of population of New Jersey, and tend to include the region radiating from New Brunswick in Middlesex County and comprising much of Monmouth, Mercer, and Somerset counties. The inclusion of adjacent areas of Hunterdon, Union, and Ocean counties is subjective and a source of debate. In 2015, "New Jersey Business" magazine, a publication of the New Jersey Business & Industry Association, defined Central Jersey more narrowly as the five counties of Hunterdon, Mercer, Middlesex, Monmouth and Somerset.