He has been Professor of Finance and Accounting at the Cranfield School of Management since 1972 (Emeritus since retiring in 2005). From 2001 was Chairman of the Trustees of the Institute of Economic Affairs, a free market think-tank, before standing down in 2015. He has written a number of textbooks on accounting and finance; and he has written other books on Inflation Accounting, the British Tax System and Accounting Standards. His two latest books are; They Meant Well: Government Project Disasters and Margins of Error in Accounting. He’s also a prolific writer of letters to the newspapers, especially the Financial Times.