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. 2011 Mar 31;6(3):e18443. doi: 10.1371/journal.pone.0018443

Figure 4. Trade volume-GDP (TGP) profile.

Figure 4

TGP of (A) Spain, (B) the RSA, (C) France, and (D) Hong Kong are displayed. Red points denote the countries with lower GDPs than the starting country, and blue points in the gray area are those with higher GDPs. The black squares represent countries that are collapsed by the starting country. The area shaded in orange denotes the region within which countries can be affected directly by the starting country.