By Frohberg Klaus   in International Advances in Economic Research

ISSN:1083-0898|16|2|223-236

Springer Publishing Company ‎(2010)‎

Access to resources Favorite 19.832436

By Sauer Johannes   Frohberg Klaus   in Journal of Productivity Analysis

ISSN:0895-562X|27|1|31-40

Springer Publishing Company ‎(2007)‎

Access to resources Favorite 15.865949