This response counters Barbieri & Levy's assessment of Anderton & Carter's empirical study of the disruption of trade by war. A close examination of Anderton & Carter's results shows significant trade disruption in 17 of 19 long war dyads and in 21 of 27 dyads in total. These results constitute reasonably strong evidence that war disrupts trade.
Anderton, Charles H. & John R. Carter (2001) On Disruption of Trade by War: A Reply to Barbieri & Levy, Journal of Peace Research 38 (5): 625–628.