A merger between Sprint and T-Mobile would cut into the wages of wireless store employees — including those working at Verizon, AT&T and all four companies’ authorized dealer stores, according to a new study.

Average weekly earnings for these retail workers “would decline by as much as 7 percent” and between 1 percent and 3 percent “in the bulk” of the markets affected by the merger, the report by the Economic Policy Institute and the Roosevelt Institute said.

Among the 50 markets hit hardest by a merger, the study found wages could erode by as much as $65 a week, or $3,276 in a year, or as little as $10 a week, or $500 a year.

“These are meaningful amounts to the working people in these jobs,” said Heidi Shierholz, senior economist and director of policy at the Economic Policy Institute, who spoke at a presentation of the study.

Among specific markets, the study said, wireless store employees in Kansas City, Kan., and in St. Louis would suffer among the larger losses in wages.