The knowledge production process of thirty universities that participated in nanobiotechnology research during 1990--2005 is estimated by a stochastic directional technology distance function. Knowledge outputs include journal articles, patents, and Ph.D students. The dual elasticity of...

This study examines productivity change in the Mid-Atlantic surfclam and ocean quahog fishery, which has been managed since 1990 using Individual Transferable Quotas (ITQ). Productivity change is estimated through a Malmquist index from 1981--2008, capturing change before and after...

In his 2005 paper in this journal, Kuosmanen argues that Shephard’s specification of weak disposability in activity analysis (DEA) models is not correct. We show that Shephard’s specification does satisfy weak disposability and is the “smallest” technology to do so. Copyright 2007,...