This report documents the results of the project “Developing and Applying Ex-Post Regulatory Impact Assessment (RIA) Indicators for Fisheries Management of Jack Mackerel and Jumbo Flying Squid,” implemented under the APEC Ocean and Fisheries Working Group (OFWG). The main objective of the project was to strengthen the capacities of APEC economies to design, validate, and apply ex post Regulatory Impact Assessment (RIA) indicators in the management of transboundary fisheries, using jack mackerel (Trachurus murphyi) and jumbo flying squid (Dosidicus gigas) in the South Pacific as case studies.

The project was motivated by the growing need to assess not only the design of fisheries regulations but also their actual performance once implemented, in contexts characterized by high biological variability, multiple jurisdictions, international fleets, and heterogeneous regulatory frameworks. In this regard, ex post RIA emerges as a key tool to enhance regulatory quality, promote transparency, and strengthen results-based governance.