In which year did Joseph Pulitzer buy the 'New York World' newspaper?

Joseph J. Pulitzer (April 10, 1847 – October 29, 1911) was a newspaper publisher of the St. Louis Post Dispatch and the New York World. Pulitzer introduced the techniques of yellow journalism (a type of journalism that presents little or no legitimate well-researched news) to the newspapers he acquired in the 1880s. He became a leading national figure in the Democratic Party and was elected congressman from New York. He crusaded against big business and corruption, and helped keep the Statue of Liberty in New York.

In 1883, Pulitzer, by now a wealthy man, purchased the New York World from Jay Gould for $346,000. The newspaper had been losing $40,000 a year. To raise circulation, Pulitzer emphasized sensational stories: human-interest, crime, disasters, and scandal.