← Search Research Policy 2026 Research excellence is hard to sustain: Evidence from Japan's WPI initiative Arsev Umur Aydınoğlu; Özgür Kadir Özer Middle East Technical University DOI10.1016/j.respol.2026.105493 Sources semanticscholar openalex Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓