However, there is no internationally established approach to calculating this impact. A recent report for the US ports industry is striking: it claims that the economic impact of its ports is $4.6tr. As this physical amount is hard to put in perspective this impact is expressed as a percentage of US GDP, which the report claims is a staggering 26%. In comparison, an economic impact study in the Netherlands reports that the GDP share of its ports industry is about 3%.
Read the Analyst’s full article @ his PortStrategy column.