Table I.

Environmental risk factors (Env)

CodeRisk factorsAuthors
Env_1Natural disasters and fireMiller (1991) and Chopra and Sodhi (2004) 
Env_2War, terrorism and political uncertaintyTang (2006) and Shubik (1983) 
Env_3Processing documents detained by government agencies (e.g. customs)Husdal and Bråthen (2010) and Yang (2010) 
Env_4Port congestion (unexpected waiting times before berthing or before starting to load/discharge)Notteboom (2006); Drewry (2009) and Tummala and Schoenherr (2011) 
Env_5Unstable weatherNotteboom (2006) and Husdal and Bråthen (2010) 
Env_6Oil price riseRao and Goldsby (2009) and Notteboom and Vernimmen (2009) and Husdal and Bråthen (2010) 
Env_7Cargo stolen from sealed containersDrewry (2009) and Husdal and Bråthen (2010) 
RemovedAttack by piratesDrewry (2009), Fu et al. (2010) and Tummala and Schoenherr (2011) 
Env_8Excessive handling because of border crossings or to change in transportation modesChopra and Sodhi (2004) 

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