Media market

A media market, broadcast market, media region, designated market area (DMA), Television Market Area (FCC term) or simply market is a region where the population can receive the same (or similar) television and radio station offerings, and may also include other types of media including newspapers and Internet content. They can coincide or overlap with 1 or more metropolitan areas, though rural regions with few significant population centers can also be designated as markets. Conversely, very large metropolitan areas can sometimes be subdivided into multiple segments. Market regions may overlap, meaning that people residing on the edge of one media market may be able to receive content from other nearby markets. They are widely used in audience measurements, which are compiled in the United States by Nielsen Media Research (television) and Arbitron (radio).
Markets are identified by the largest city, which is usually located in the center. However, geography and the fact that some metropolitan areas have large cities separated by some distance can make markets have unusual shapes and result in two, three, or more names being used to identify a single region (such as Wichita-Hutchinson, Kansas; Chico-Redding, California; Albany-Schenectady-Troy, New York; and Harrisburg-Lebanon-Lancaster-York, Pennsylvania).
In North America, radio markets are generally a bit smaller than their television counterparts, as broadcast power restrictions are stricter for radio than TV, and TV reaches further via cable. AM band and FM band radio ratings are sometimes separated, as are broadcast and cable television. Market researchers also subdivide ratings demographically between different age groups, genders, and ethnic backgrounds; as well as psychographically between income levels and other non-physical factors. This information is used by advertisers to determine how to reach a specific audience. In countries such as the United Kingdom, a government body defines the media markets; in countries such as the United States, media regions are defined by a privately held institution, without government status.

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n 2008, the population of the city proper was estimated to be more than 1.54 million,[4] while the Greater Philadelphia metropolitan area's population of 5.8 million made it the country's fifth largest. The city, which lies about 80 miles (130 km) southwest of New York City,[5] is the nation's fourth-largest urban area by population and its fourth-largest consumer media market, as ranked by the Nielsen Media Research.
It is the county seat of Philadelphia County, with which it is coterminous. Popular nicknames for Philadelphia include Philly and The City of Brotherly Love, from the literal meaning of the city's name in Greek (Greek: Φιλαδέλφεια ([pʰilaˈdelpʰeːa], Modern Greek: [filaˈðelfia]) "brotherly love", compounded from philos (φίλος) "love", and adelphos (ἀδελφός) "brother").
A commercial, educational, and cultural center, Philadelphia was once the second-largest city in the British Empire[6] (after London), and the social and geographical center of the original 13 American colonies. It was a centerpiece of early American history, host to many of the ideas and actions that gave birth to the American Revolution and independence. It was the most populous city of the young United States, although by the first census in 1790, New York City had overtaken it. Philadelphia served as one of the nation's many capitals during the Revolutionary War and after. After the ratification of the U.S. Constitution, the city served as the temporary national capital from 1790 to 1800 while Washington, D.C., was under construction.

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