The attorney general of Connecticut, Richard Blumenthal, has joined an investigation led by his counterpart in New York into the arrangements colleges make with study-abroad program providers, The Hartford Courant reported.

Mr. Blumenthal has requested records from 10 higher-education institutions in that state, including Yale University and the University of Connecticut, the newspaper said. It identified the other institutions as the University of Hartford; Fairfield, Quinnipiac, Sacred Heart, and Wesleyan Universities; and Albertus Magnus, Connecticut, and Trinity Colleges.

Attorney General Andrew M. Cuomo of New York has requested information from 15 other institutions, in New York and other states, in the joint investigation. The attorneys general want to find out whether the universities or administrators received free trips, gifts, or other incentives to choose one program provider over another. Such practices can drive up costs for students.

In addition to records of financial transactions, Mr. Blumenthal has asked to see all student complaints about study-abroad programs at the Connecticut institutions since 2001, the Courant reported. It described his letters as “requests for voluntary production” rather than subpoenas, and quoted Mr. Blumenthal as saying the colleges were complying.

Two institutions, Wesleyan and UConn, told the Courant that they had paid the travel costs when their staff members went overseas to evaluate programs. One, Connecticut College, said that it allowed staff members to travel at the providers’ expense on “familiarizing trips,” but that such free trips did not sway its decisions. Yale officials said the university had policies to guard against conflicts of interest among administrators but could not immediately say if free trips were allowed.

Mr. Cuomo’s inquiry began last August with subpoenas to companies and expanded to colleges this month. —Charles Huckabee