 His work on 'Effective Rates of Protection and Domestic Resource Cost', prepared and published jointly with Bhagwati and T. N. Srinivasan, made a significant impact on the trade policy regimes of the 1960s and 1970s.He worked on development models and resource gaps for the countries of the United Nations Economic and Social Commission for Asia and the Pacific (ESCAP) region that were presented under the leadership of Nobel Laureate Jan Tinbergen while he was a staff member of the ESCAP (then ECAFE).This became the basis for Resource Transfer for Development in the ESCAP region in the 1970s.