Irwin M. Stelzer (born 22 May 1932) is an American economist who is the U.S. economic and business columnist for The Sunday Times in the United Kingdom and The Courier-Mail in Australia. In the United States, he has been a contributing editor at The Weekly Standard. Stelzer is a consultant on market strategy, pricing and antitrust issues, and regulatory matters for U.S. and United Kingdom industries. He is also an occasional contributor to The Guardian, the Daily Telegraph and the New Statesman. He resides in London and the United States. Some British politicians and newspapers have vilified Stelzer as Rupert Murdoch's right-hand man, an assertion that Stelzer denies.
Stelzer received both his BA degree and his MA degree from New York University. At Cornell University he earned a Ph.D. in economics. He has had teaching appointments at Cornell University, the University of Connecticut, and New York University and he has also been a teaching member of Columbia University’s Continuing Legal Education Programs. He has been elected a Visiting Fellow at Nuffield College, Oxford. He is a former member of the Litigation and Administrative Practice Faculty of the Practising Law Institute. He served on the Massachusetts Institute of Technology Visiting Committee for the Department of Economics.