Big Apple
Although the history of "Big Apple " was once thought a mystery, a clearer picture of the term's history has emerged due to the work of amateur etymologist Barry Popik, and Gerald Cohen of Missouri University of Science and Technology. A number of false theories had previously existed, including a claim that the term derived from a woman named Eve who ran a brothel in the city. This was subsequently exposed as a hoax.
Economy of New York City
New York is by far the most important center for American mass media, journalism, and publishing. The city is the top media market in the United States, with 7% of the country’s television-viewing households. Three of the Big Four music recording companies have their headquarters in the city. More than 200 newspapers and 350 consumer magazines have an office in the city. The book publishing industry alone employs 25,000 people. For these and other reasons, New York is often called "the media capital of the world". 
New York is a prominent location for the American entertainment industry, with many films, television series, books, and other media being set there. New York City is the second largest center for filmmaking and television production in the United States, producing about 200 feature films annually, employing 130,000 individuals; the filmed entertainment industry has been growing in New York, contributing nearly US$9 billion to the New York City economy alone as of 2015, and by volume, New York is the world leader in independent film production – one-third of all American independent films are produced in New York City. The Association of Independent Commercial Producers is also based in New York. In the first five months of 2014 alone, location filming for television pilots in New York City exceeded the record production levels for all of 2013, with New York surpassing Los Angeles as the top North American city for the same distinction during the 2013/2014 cycle.