ACADEMIC RESEARCH AND INDUSTRIAL-INNOVATION

被引：635

作者：

MANSFIELD, E

机构：

[1] Department of Economics, University of Pennsylvania, Philadelphia

来源：

关键词：

D O I：

10.1016/0048-7333(91)90080-A

中图分类号：

C93 [管理学];

学科分类号：

12 ; 1201 ; 1202 ; 120202 ;

摘要：

[No abstract available]

引用

页码：1 / 12

页数：12

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