“…However, until recently, economic indicators were not commonly used to measure geographic slices of the economy such as oceans, forests, or fields. Estimating the value of an "ocean economy" was unheard of until the 1970s (Pontecorvo et al, 1980) and even then research only reported a snapshot in time, not the time series necessary to understand trends. Currently numerous nations including the USA, the UK, France, and Canada keep ocean accounts that help them to better understand the status, nature, and value of that ocean economy, and to identify the trends that underlie projections and forecasts.…”