SHENG-KAI CHANG2018-09-102018-09-102005http://www.scopus.com/inward/record.url?eid=2-s2.0-29244440690&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/316016The approximate slopes and the power of the GMM overidentifying restrictions testjournal article10.1080/13504850500282324