Text ( visual ) : unmediated Social-welfare improving inequalization : a note / Masatoshi Yamada. -- Toyonaka : Graduate School of Economics and Osaka School of International Public Policy (OSIPP) Osaka University , 2000. -- 13 p. ; 21 cm. -- (Discussion papers in economics and business ; 00-02). -- Includes bibliographical references (p. 12). -- (BA50836203) ; https://ci.nii.ac.jp/ncid/BA50836203 Author Heading(s): 山田, 雅俊