Yew-Kwang Ng looks to make welfare economics more complete by discussing the recent inframarginal analysis of division of labour and by pushing welfare economics from the level of preference to that of happiness, making a reformulation of the foundation of public policy necessary. A theory of the third best is provided, with extension to the equality/efficiency issue. The remarkable conclusion of treating a dollar as a dollar provides a powerful simplification of public policy formulation in general and in cost-benefit analysis in particular.

This volume is a collection of selected papers using the framework of inframarginal analysis of the division of labour held at Monash University on 6-7 July 2001. This framework, pioneered mainly by Professor Xiaokai Yang, (with joint researches involving all the three editors and many of the authors), has been recommended by Professor James Buchanan (Nobel Laureate in Economics) as the most important analysis in economics in the world today.