David Henderson, head of the Economics and Statistics Department at the Organisation for Economic Co-operation and Development (OECD), examines the influence of economic ideas on policy. He gives the sixth and final lecture in his series entitled 'Innocence and Design'.

In this lecture entitled 'Markets, States and Economics', David Henderson puts forward the uses of economics and concludes his comparison between orthodox economic and Do-It-Yourself Economics. Setting these arguments in a wider context Henderson considers the political as well as cultural effects these two systems have on society.