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Hillary Rodham Clinton on Friday will use a speech focused on growing the economy to endorse a $15-an-hour minimum wage proposal for fast-food workers recommended by a New York panel, a person briefed on her plans said.

The remarks from Mrs. Clinton will come in the city where the fast-food workers’ labor effort first started several years ago. A panel created by Gov. Andrew M. Cuomo on Wednesday recommended the change; the increase will occur faster in New York City than other parts of the state because of the higher cost of living there.

Some Democrats are pushing for the federal minimum wage to be raised to $15 an hour, including two other candidates for the party’s presidential nomination: Bernie Sanders, the Vermont senator, and Martin O’Malley, the former Maryland governor.

Mrs. Clinton has argued that the national minimum wage of $7.25 an hour needs to be increased, but she has not gone so far as to endorse an increase to $15. Her embrace of the New York recommendation for fast-food workers will be her first endorsement of a $15-per-hour minimum in any context.

In a town hall in New Hampshire, Mrs. Clinton suggested a nuanced view of the national minimum-wage debate, one that is more localized than a uniform change in federal policy.

“I think part of the reason that the Congress and very strong Democratic supporters of increasing the minimum wage are trying to debate and determine what’s the national floor is because there are different economic environments,” Mrs. Clinton said. “And what you can do in L.A. or in New York may not work in other places.”