We repeat these correlation exercises using a separate and equally popular export similarity technique, known as the Finger-Kreinin Index (FKI), as a check for the robustness of these results. The FKI endeavours to estimate export similarity by calculating the relative importance of various commodities in the export structure of pairs of countries, and then using a filtering technique, that is: The first ratio is the share of product i in country a’s total exports and the second ratio is the share of commodity i in country b’s exports. If those shares are equal, then the ratio in the formula would sum to one, indicating perfect similarity. On the other hand, if they are totally different, the formula would be zero. Thus the index can range from 0 to 1. Like the SRCC, this index is sensitive to the degree of disaggregation. We use the same level (SITC 5-digit) for these calculations as well.