Modelling the impact of non‐tariff measures on supply chains in ASEAN

This paper explores the impact of reducing non‐tariff measures (NTMs) in major ASEAN countries. New econometric estimates of the impact of different types of NTMs are used in a global supply chain model to separately model the effects on intermediate products and those sold to final consumers. We also distinguish between whether the NTM cost burden is directed at exporters or importers. This paper makes important advances in modelling the heterogeneity of NTMs, offering much richer policy analysis of the impact of NTMs on supply chains in the Asia‐Pacific region than has previously been possible. We illustrate the benefits, both to the major ASEAN countries and to their trading partners, from the partial liberalisation by ASEAN countries of their most trade distorting types of NTMs. Such liberalisation increases the GDP and welfare of all countries, with the effect particularly pronounced for the major ASEAN countries themselves, especially Vietnam and the Philippines. As trade in plant products and animal products is particularly affected by NTMs, these sectors show the largest expansion of trade.