WASHINGTON — The Municipal Securities Rulemaking Board’s expenses over the next two years will increase “at ­significantly higher rates” as the MSRB continues to expand its information systems and begins to regulate municipal advisers, the board is cautioning.

Its warnings come in a 10-page response to industry groups’ and other market participants’ criticisms of its proposal to nearly double the fees it collects from dealer firms. The MSRB filed its response with the Securities and Exchange Commission on Nov. 19.

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