Consent of Deloitte & Touche LLP

EX-23.1 2 dex231.htm CONSENT OF DELOITTE & TOUCHE LLP Consent of Deloitte & Touche LLP

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement on Form S-1 of our report dated July 31, 2007 relating to the consolidated financial statements of MSCI Inc., appearing in the Prospectus, which is part of this Registration Statement.

We also consent to the reference to us under the heading “Experts” in such Prospectus.

/s/ Deloitte & Touche LLP

New York, New York

July 31, 2007