Enhancing Countries’ Fitness with Recommender Systems on the International Trade Network

Figure 4

Detailed view of the fitness as a function of the length of the recommendation list for four randomly selected countries. The original fitness values of four countries Croatia, Kazakhstan, Poland, and Colombia are 2.0563, 0.7234, 3.7678, and 1.0714, respectively.

(a) Croatia

(b) Kazakhstan

(c) Poland

(d) Colombia