For them, subsidies include all government interventions, or even lack of intervention, that affect the fisheries industry and that have an economic value. This covers services, direct financial transfers and indirect transfers (such as tax exemptions), regulations (such as import quotas, foreign direct investment regulations, gear regulations), and lack of intervention (for example, free access to fishing grounds, lack of management measures, inadequate enforcement). It is hard to compare these estimates, given the different data sources, methodologies, timescales, geographical areas and definitions used.