Export diversification in CIS

CIS countries are quite open relative to other countries. For example, Ukrainian trade openness presented at Figure 1 below was very high taking into account that Ukraine is a large country:

 However, the trade of CIS is poorly diversified in products that are not the main items of their export. For example, Russian export of oil and Ukrainian export of metals are diversified geographically quite well, but export of other product is not diversified and  concentrated within the CIS region. Here is the figure from me recent paper "Export diversification across industries and space: do CIS countries diversify enough?" that demonstrates geographical and product diversification of exports in CIS and Eastern Europe: