Technology change and the economics of silvicultural investment /

"August 1993."

International direct investment : global trends and the U.S. role.

Mode of access: Internet.

Productivity change and the measurement of heterogeneous labor inputs /

"Presented at the U.S.--Israeli Department-to-Ministry Seminar Program, Jerusalem, Israel, October 17-20, 1988."

Changes in the global carbon cycle and the biosphere /

Mode of access: Internet.