{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T12:41:43Z","timestamp":1784205703146,"version":"3.55.0"},"reference-count":67,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T00:00:00Z","timestamp":1773014400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Systems"],"abstract":"<jats:p>Based on 2011\u20132022 panel data covering 278 Chinese cities, a panel fixed-effects model, a mediating effect model, and a threshold regression model are used to conduct an empirical analysis of the influence of the digital economy (DE) on urban carbon emission performance from the quantitative and efficiency perspectives. The key findings include the following: (1) An inverted U-relationship is observed between the DE development and urban per capita carbon emissions (PCE), while the nexus between the DE and carbon emission efficiency (CEE) follows a U-shaped pattern. (2) The DE yields a stronger carbon reduction effect once green technology innovation attains elevated levels; conversely, under conditions of nascent green innovation, its principal impact manifests through improvements in CEE. Only when green technology innovation surpasses a critical threshold does the DE begin to reduce carbon emissions. (3) Heterogeneity analysis indicates that, in optimization and upgrading agglomerations, carbon emissions are reduced by DE at a later time point. In growth and expansion agglomerations, the impact of DE on CEE is more evident. Moreover, policy priorities should include fostering innovation-driven digitalization, expanding green technology diffusion, and optimizing regional mechanisms for coordinated low-carbon growth.<\/jats:p>","DOI":"10.3390\/systems14030291","type":"journal-article","created":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T15:49:42Z","timestamp":1773071382000},"page":"291","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Digital Economy, Green Technology Innovation and Urban Carbon Emissions: Evidence from Chinese Cities"],"prefix":"10.3390","volume":"14","author":[{"given":"Ran","family":"Wu","sequence":"first","affiliation":[{"name":"School of Administration, Northeastern University, Shenyang 110167, China"},{"name":"School of Economics, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shimao","family":"Su","sequence":"additional","affiliation":[{"name":"School of Economics, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiyun","family":"Hou","sequence":"additional","affiliation":[{"name":"School of Economics, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3531-0538","authenticated-orcid":false,"given":"Xiaolei","family":"Wang","sequence":"additional","affiliation":[{"name":"Business School, Harbin Institute of Technology, Harbin 150006, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1029\/2008GL036540","article-title":"Journey to world top emitter: An analysis of the driving forces of China\u2019s recent CO2 emissions surge","volume":"36","author":"Guan","year":"2009","journal-title":"Geophys. 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