highly significantP < 10 −4
There is a highly significant correlation between price volatility of the resource r in the EU, σ EU r , and TradeRisk (ρ = 0.71, P < 10 −4 ) (see Fig. 2A ).
There is a highly significant correlation between price volatility of the resource r in the EU, σ EU r , and TradeRisk (ρ = 0.71, P < 10 −4 ) (see Fig. 2A ).
S1, we find an increasing trend of both correlations by increasing α.