In our theoretical framework, capabilities are crucial in explaining the economic performances of countries. As can be observed on the left, conceptually, we can visualize capabilities as an intermediate layer in a tripartite country-capability-product network. Capabilities are non-measurable entities, and information on them can be inferred by building an empirical country-product network through international trade data. As can be seen on the right, such a bipartite network can be interpreted as the projection of the tripartite network. In the country-product network, a
link is established if and only if the country has a revealed comparative advantage in exporting the product [,].