?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Sun&rft.aufirst=Liyang&rft.au=Sun%2C+Liyang&rft.date=9+October+2023&rft.issn=1368-4221&rft.atitle=Double+robustness+for+complier+parameters+and+a+semi-parametric+test+for+complier+characteristics&rft.title=Econometrics+Journal&rft.genre=article