The U.S. Treasury Department strongly refuted claims that it failed to collaborate with other regulators on a study of the asset management industry carried out last year, the Wall Street Journal reports.

In a letter to Rep. Darrell Issa (R-Calif.), chairman of the House Committee on Oversight and Government Reform, the Treasury Department details months of back and forth between the its Office of Financial Research and the Securities and Exchange Commission regarding the study, which, according to the Wall Street Journal, has become a point of contention in the debate over whether asset managers should be forced to comply with stricter regulations.