著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL Roberto S. Mario and University of the Philippines. Institute of Economic Development and Research,On the existence of moments of the ordinary least squares and two-stage least squares estimators,,"Institute of Economic Development and Research, School of Economics, University of the Philippines",1970,Discussion paper,,,,https://cir.nii.ac.jp/crid/1130282270200581760