{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T13:08:42Z","timestamp":1789564122225,"version":"build-2803163510"},"reference-count":39,"publisher":"Oxford University Press (OUP)","issue":"3","license":[{"start":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T00:00:00Z","timestamp":1775088000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/501100001809","name":"NSFC","doi-asserted-by":"publisher","award":["W2531055"],"award-info":[{"award-number":["W2531055"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"NSFC","doi-asserted-by":"publisher","award":["72133002"],"award-info":[{"award-number":["72133002"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Hong Kong Research Grants Council","award":["14500325"],"award-info":[{"award-number":["14500325"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,9,16]]},"abstract":"<jats:title>Summary<\/jats:title>\n                  <jats:p>We consider a correlated random coefficient panel data model with two-way fixed effects and interactive fixed effects in a fixed T framework. The model allows slope coefficients to be arbitrarily correlated with the regressors, accommodating flexible forms of heterogeneity. We propose a two-way mean group estimator for the expected value of the slope coefficient and propose a leave-one-out jackknife method for valid inference. We apply our new methods to examine the relationship between healthcare expenditure and income.<\/jats:p>","DOI":"10.1093\/ectj\/utag010","type":"journal-article","created":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T11:57:10Z","timestamp":1775044630000},"page":"424-442","source":"Crossref","is-referenced-by-count":0,"title":["Two-Way Mean Group Estimators for Heterogeneous Panel Models with Fixed\n                    <i>T<\/i>"],"prefix":"10.1093","volume":"29","author":[{"given":"Sainan","family":"Jin","sequence":"first","affiliation":[{"name":"School of Social Sciences, School of Economics and Management, Tsinghua University , Haidian District, Beijing 100084 ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xun","family":"Lu","sequence":"additional","affiliation":[{"name":"Chinese University of Hong Kong Department of Economics, , Chung Chi Road, Ma Liu Shui ,","place":["Hong 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