The advantage of constructing estimates on the ocean economy within the framework used for BEA’s GDP accounts is that the overall ocean economy can be compared to GDP for the nation. This includes ocean economy activity as a percentage of GDP as well as whether GDP for the ocean economy is growing faster or slower than the overall U.S. economy. For the ocean economy statistics, BEA provides measures of “value added” for each industry that makes up the ocean economy, for groups of ocean economy goods and service types, and for the ocean economy overall. Value added refers to the contribution of labor and capital by each industry to the nation’s GDP. It is the value that an industry generates after accounting for the cost of energy, materials, and services used up in production.