RESEARCH AND DEVELOPMENT ACTIVITY AND PROFITABILITY - DISTRIBUTED LAG ANALYSIS

被引：103

作者：

BRANCH, B ^{[1
]}

机构：

[1] DARTMOUTH COLL,HANOVER,NH 03755

来源：

关键词：

D O I：

10.1086/260252

中图分类号：

F [经济];

学科分类号：

02 ;

摘要：

引用

页码：999 / 1011

页数：13

共 15 条

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