Text ( visual ) : unmediated Labor unions and the economic performance of firms / Barry T. Hirsch. -- pbk ; hard. -- Kalamazoo, Mich. : W.E. Upjohn Institute for Employment Research , 1991. -- ix, 142 p. ; 23 cm. -- Includes bibliographical references (p. 131-137) and index. -- ISBN 0880991100 ; 0880991097 ; (BA18450146) ; https://ci.nii.ac.jp/ncid/BA18450146 Author Heading(s): Hirsch, Barry T.. -- Classification(s): LCC : HD6508 ; DC20 : 331.88/0973. -- Subject Heading(s): LCSH : Trade-unions -- Economic aspects -- United States ; LCSH : Profit -- United States ; LCSH : Capital investments -- United States ; LCSH : Research, Industrial -- United States ; LCSH : Industrial productivity -- United States