A market is one of many varieties of systems, institutions, procedures, social relations and infrastructures whereby parties engage in exchange. While parties may exchange goods and services by barter, most markets rely on sellers offering their goods or services (including labor) in exchange for money from buyers. It can be said that a market is the process by which the prices of goods and services are established.

For a market to be competitive, there must be more than a single buyer or seller. It has been suggested that two people may trade, but it takes at least three persons to have a market, so that there is competition on at least one of its two sides. However, competitive markets rely on much larger numbers of both buyers and sellers. A market with single seller and multiple buyers is a monopoly. A market with a single buyer and multiple sellers is a monopsony. These are the extremes of imperfect competition.

Markets vary in form, scale (volume and geographic reach), location, and types of participants, as well as the types of goods and services traded. Examples include:

Malcolm Stevenson "Steve" Forbes, Jr. (born July 18, 1947) is an American publishing executive who was twice a candidate for the nomination of the Republican Party for president. He is the editor-in-chief of business magazine Forbes as well as president and chief executive officer of its publisher, Forbes Inc. He was a Republican candidate in the U.S. Presidential primaries in 1996 and 2000. He is the son of longtime Forbes magazine publisher Malcolm Forbes and the grandson of that publication's founder, B.C. Forbes.

Forbes was born in Morristown, New Jersey, the son of Roberta Remsen (née Laidlaw) and Malcolm Forbes. He is married to Sabina Beekman, and they have five daughters; Sabina, Roberta, Catherine, Moira, and Elizabeth. Forbes attended Far Hills Country Day School. He graduated cum laude in 1966 from Brooks School in North Andover, Massachusetts, and was in the Princeton class of 1970. While at Princeton, Forbes founded his first magazine, Business Today, with two other students. Business Today is currently the largest student-run magazine in the world.

Joseph Antonio Cartagena (born August 19, 1970), better known by his stage name Fat Joe, is an American rapper, CEO of Terror Squad Entertainment, and member of musical groups D.I.T.C. and Terror Squad.

Fat Joe's first album was Represent, released in 1993, followed by Jealous One's Envy in 1995. From 1998 to 2006, he was signed to Atlantic Records, releasing four albums under the label, Don Cartagena in 1998, Jealous Ones Still Envy (J.O.S.E.) in 2001, Loyalty in 2002, and All or Nothing in 2005. Around the release of All or Nothing, Fat Joe became involved in a highly publicized feud with another New York City-based rapper 50 Cent, who attacked Fat Joe in his song "Piggy Bank". His most popular song in which he performed was his Remy Ma duet "Lean Back" with Terror Squad. The song was a number-one hit in the summer of 2004.

Starting in 2006, when his album Me, Myself, & I was released, Fat Joe was signed to Imperial Records, which distributes through Terror Squad Entertainment. His follow up album wasThe Elephant in the Room, which was released in 2008; Jealous Ones Still Envy 2 (J.O.S.E. 2), the sequel to Jealous Ones Still Envy (J.O.S.E.), was released in October 2009. His tenth album The Darkside Vol. 1 was released on July 27, 2010.

Khaled Bin Abdul Khaled (born November 26, 1975), better known by his stage name DJ Khaled, is an American record producer, radio personality, DJ, rapper & record label executive. He is a radio host for the Miami-based urban music radio station WEDR and the DJ for the hip hop group Terror Squad. In 2006, Khaled released his debut album Listennn... the Album. He went on to release We the Best (2007), We Global (2008), Victory (2010), and We the Best Forever (2011). In 2009, Khaled became the president of record label Def Jam South.

Khaled was born in New Orleans, Louisiana. He is of Palestinian descent and lives in Sunny Isles, Florida. Currently, he hosts the weeknight program TakeOver on Miami-based urban music radio station WEDR with fellow host K. Foxx; Khaled states that he has worked for the station professionally since 2003. Early in his career he dj'd for a south Florida regional station Power 96.5 FM. In 1998, Khaled worked as a "sidekick" for Miami rapper Luther Campbell for Campbell's Friday night WEDR radio show The Luke Show. In his albums, Khaled usually provides "shoutouts" that assert his representation of "the ghetto" and urges people to listen. From 2004 to 2006, Khaled assisted in the production of the hip-hop albums Real Talk by Fabolous, True Story by Terror Squad, All or Nothing by Fat Joe, and Me, Myself, & I by Fat Joe. Many of DJ Khaled's songs are known to entice the listener by hip hop chanting his name before the song starts. Khaled represents the Kendall area of Miami. He is Muslim. He is currently engaged to Nicole Tuck.