A vertical index of direct competition in international trade: The case of CHINDIA and CARICOM

This paper assesses the genealogy of competitive indices in international trade and theoretically develops a measure of export threat which estimates direct competition in vertical market segments. We identify the assumption of homogeneity in these export threat measures as a weakness that undermines accuracy. Hence, we develop a new measure of export threat, the direct intra-market threat (DIMT), which incorporates relative vertical and market share changes over time to accurately estimate a country’s direct threat to other exporters in a third market. We argue that the market segmentation method applied in complement to the DIMT estimate provides an all-encompassing methodology in the estimation of export threat, which we argue is superior to the Dynamic Index of Competitive Threat (DICT) and Direct Threat methodologies. The paper uses the case of China and India (CHINDIA) and the Caribbean Community (CARICOM) to assess the empirical estimates of the DIMT relative to DICT and Direct Threat over the period 2000–2021. Our study is motivated by a research gap in the estimation of the competitive threat posed by a large, diversified exporter on Small Island Developing States (SIDS).