NEW YORK--(BUSINESS WIRE)--Nielsen N.V. (NYSE:NLSN) today announced first quarter 2015 results and that its Board of Directors approved an increase in the company’s quarterly cash dividend of 12% to $0.28 per common share. Revenues were $1,458 million, down 2.1% due to the impact of foreign exchange but up 4.4% on a constant currency basis, compared to the first quarter of 2014. “Nielsen’s first quarter results again illustrate the consistency of our business model and strong execution, with 4.