1. Former Graduate Research Assistant, 228 Cheatham Hall, Department of Forest Resources and Environmental Conservation, Virginia Tech , Blacksburg, VA 24061-0324 , USA
2. Professor and Langdale Endowed Chair in Forest Business, 180 East Green Street, Harley Langdale Jr. Center for Forest Business, Warnell School of Forestry and Natural Resources, University of Georgia , Athens, GA 30602 , USA
3. Garland Gray Professor of Forest Operations, 228D Cheatham Hall, Department of Forest Resources and Environmental Conservation, Virginia Tech , Blacksburg, VA 24061-0324 , USA
4. Associate Professor of Forest Operations and Extension Specialist, 228E Cheatham Hall, Department of Forest Resources and Environmental Conservation, Virginia Tech , Blacksburg, VA 24061-0324 , USA