{"query_echo":{"q":"","filters":{"analysis_type":["empirical comparison"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'empirical comparison' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":1,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=empirical+comparison","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"sei-000521","url":"https://climateinsightsdirectory.org/document/sei-000521","title":"First empirical comparison of energy footprints embodied in trade: MRIO versus PLUM","publisher":{"name":"Stockholm Environment Institute","organization":"stockholm-environment-institute"},"document_type":"research paper","language":"en","date_published":"2009-05-01","source_url":"https://www.sei.org/publications/first-empirical-comparison-energy-footprints-embodied-trade-mrio-versus-plum/","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","analysis_type"],"summary":{"text":"The study finds that while NFA-PLUM and MRIO models produce comparable total figures for UK imports and exports, they diverge significantly when results are broken down by economic sector. The discrepancies are attributed to NFA-PLUM's omission of services, upstream fossil fuel impacts, and the use of inappropriate embodied energy factors, leading the authors to conclude that MRIO models are better suited for comprehensive footprint accounting.","ai_generated":true,"unit":"sei-000521#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"While the total energy footprints for imports and exports are similar across both methods, there is little correlation and significant difference between the NFA-PLUM and MRIO results when analyzed by economic sector.","ai_generated":true,"unit":"sei-000521#insight-1","date_modified":"2026-10-23"},{"text":"The differences between the two calculation methods are primarily caused by the NFA-PLUM's failure to account for trade in services (specifically transport), the upstream impacts of fossil fuels, and the application of incorrect embodied energy factors.","ai_generated":true,"unit":"sei-000521#insight-2","date_modified":"2026-10-23"},{"text":"The authors argue that input-output based approaches, specifically MRIO models, are more effective for comprehensive footprint accounting because they can track international supply chains, inter-industry linkages, and multi-national trade flows.","ai_generated":true,"unit":"sei-000521#insight-3","date_modified":"2026-10-23"}],"climate_tags":["fossil fuel"],"geography_discussed":[],"frame_perspective":[],"analysis_type":["empirical comparison"]}]}