Media type: E-Article Title: Efficient GMM estimation with singular system of moment conditions Contributor: Xiao, Zhiguo Published: Informa UK Limited, 2020 Published in: Statistical Theory and Related Fields, 4 (2020) 2, Seite 172-178 Language: English DOI: 10.1080/24754269.2019.1653159 ISSN: 2475-4269; 2475-4277 Origination: Footnote: Access State: Open Access