Cod Wars of nationalism and party competition for Iceland and pressure from the trawling industry for Britain are reasons that both sides took actions that were of noticeable risk to their broader security interests. Interdepartmental competition and unilateral behaviour by individual diplomats were also factors, with the British Ministry of Agriculture and Fisheries influencing the British government's decision 'more than the Foreign Office'. A 2017 study argues that both a combination of powerful domestic pressures on statesmen to escalate and miscalculation by those statesmen contributed to the outbreak of the Cod Wars. The study argues that Iceland won each of the Cod
Cod fisheries halibut, haddock, and mackerel became prominent off the Atlantic coast. The use of the long line and purse seine net increased the size of the catch. Apart from its long history, this particular trade also differs from most other fishing trades by the location of the fishing grounds, far from large populations and without any domestic market. The large cod fisheries along the coast of North Norway (and in particular close to the Lofoten islands) have been developed almost uniquely for export, depending on sea transport of stockfish over large distances. Since the introduction of salt, dried salt cod ('klippfisk'