A higher number indicates a greater impact. For example, payments based on variable input use have the largest impact on fishing effort and reduce stock size the most. The picture is complex, but the results show a clear separation between policies that are based on what fishers buy (fuel, other inputs) and what fishes own and do (vessels, capital, income). The former tend to pose the greatest risk to overfishing and depletion of fish stocks while the latter provide the greatest benefits to fishers.