共 27 条
[11]
*DTI, 1999, BIOT CLUST REP TEAM
[14]
Griliches Z., 1992, SCANDINAVIAN J EC, V94, pS29, DOI [10.2307/3440244, DOI 10.2307/3440244]
[15]
THE ANALYSIS OF BUSINESS CONCENTRATION - A STATISTICAL APPROACH
[J].
JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-GENERAL,
1956, 119 (02)
:150-181