The scores of designer fashion shows, big-spending celebrity clients and lavish parties generate an annual economic impact of $887 million, according to a newly released analysis by the New York City Economic Development Corporation. About 180,000 people are employed in the fashion industry in New York, according to the study. “It creates a climate where other people want to come to New York City,” said state Senator Brad Hoylman, whose district encompasses many fashion industry locations in Manhattan. The week’s economic benefit tops the annual U.S. Open tennis tournament, which generates about $800 million, the 2014 Super Bowl in New Jersey that generated about $550 million and the New York City Marathon that generates $340 million, according to the report.