Nanak Kakwani is a Distinguished Fellow of the Gulati Institute of Finance and Taxation in India. He was elected as a Fellow of the Australian Research Committee of Social Science and awarded the Mahalanobis gold medal for outstanding quantitative economics contributions. His well-known Kakwani Index has been a standard measure for progressivity in taxation and other social science. Nanak Kakwani has been Visiting Professor of Economics at the China Institute for Income Distribution at Beijing Normal University since 2017. He was a Professor of Economics and Head of the Department of Econometrics at the University of New South Wales in Sydney during 19702000. He was Chief Economist and Director of the United Nations Development Programmes International Policy Centre for Inclusive Growth in Brazil from 2004 to 2006. Hyun H. Son is a principal evaluation specialist in the Independent Evaluation Department of the Asian Development Bank (ADB). Before joining ADB in March 2007, she was a poverty specialist at the United Nations Development Programme. She also worked for the World Bank in Washington D.C. and taught at Macquarie University in Sydney, Australia. She has a Ph.D. in Economics from the University of New South Wales and a Masters in Public Policy from Harvard University.