BAMLAK A. (2009), Technical Efficiency and its determinants across agro-ecological zones in Ethiopia: the impact of poverty and asset endowments: Medwell Agricultural Journal 4(4): 202-207. ISSN: 1816-9155
DOMPTAIL S., POPP A., NUPPENAU E.-A.(2009), A trade-off analysis between rangeland health and income generation in southern Namibia. In: Agrobiodiversity, Conservation and Economic Development. Eds. Kontoleon A, Pascual U, Smale M. Routledge Publishers. 304-332.
DOMPTAIL S., POPP A., BLAUM N., JELTSCH F.(2009), Landuse experience does qualify for adaptation to climate change. Ecological Modelling, 220:694-702 pp.
DOMPTAIL S., POPP A., NUPPENAU E.-A., (accepted), Land tax: towards a multifunctional institutional tool for land reform and rangeland conservation. Submitted to the International Journal of Environmental Policy and Decision Making (IJEPDM)
FANG L., NUPPENAU E.-A.(2009), Programming a spatial water model for improving water efficiency in China. Water Policy, 11/4, pp. 504–523.
GETACHEW A. (2009): Linking Smallholders into the Exchange Economy: Market Integration of Banana producers in Ethiopia. In: Giametta, G. & Zimbalatti, G. (eds.): Proceedings of the XXXIII CIOSTA CIGR V Conference, Technology, and Management to Ensure Sustainable Agriculture, Agro Systems, Forestry, and Safety. Reggio Calabria, Italy, 17-19 June 2009: 1437-1441.
KAMPANAT V. (2009), „An Ecological Economic Analysis of Swine wastes in a Peri-Urban Area of Thailand.”, Univ. Diss.
NUPPENAU E.-A., BABU TS.AMJATH (2009), Bargaining for Risk Reduction; A Political Economy Model on the Specification of Regulations in the Use of GM Crops. Yearbook of Socioeconomics in Agriculture. Schweizerische Gesellschaft für Agrarwirtschaft und Agrarsoziologie. pp. 113-142.
NUPPENAU E.-A. (2009), Managing Salinity in Degraded Solis by Mandatory Tree Planting: On the Dynamic and Political Economy modelling of a Common Poll Resource. In: Kimhi, A., Finkelstein, I., ed. , The Economics of Natural and human Resources in Agriculture. Nova Science. New York. Chapter 3, pp. 31- 54.
NUPPENAU E.-A. (2009), Economies of scale, energy use and enterprise size in agriculture: modelling of policies to reduce carbon dioxide and greenhouse gas emissions. ŽEMĖS ŪKIO MOKSLAI (Lithuanian Agricultural Sciences) T.16 Vol.3-4, pp. 206–213.
NUPPENAU, E.-A. (2009), Size, Energy Use and Economies of Scale: Modelling of Policy Instruments to Address Small Farms’ Advantages if Energy Is Scarcer and Ecology Matters. Paper at the 111th EAAE-IAAE Seminar Small farms: Decline or Persistence? Canterbury, 26th-27th June 2009, CD-ROM.
NUPPENAU, E.-A. (2009), Valuation of biodiversity in cultural landscapes: finding equilibrium prices of species as ecologists', farmers' and citizens' preferences. 1st International Conference on Landscape Economics July 2-4, 2009 Vienna, Austria, http://www.ceep-europe.org/workshop_files/workshop48_131.pdf
NUPPENAU, E.-A. (2009), Valuing the recycling of waste as an Eco-System Service, AVA4 Congress, Aspects and Visions Applied Economics Informatics, Debrecen 26 to 27. March 2009. Faculty of Agricultural Economics and Rural Development, University of Debrecen, Hungary.
NUPPENAU, E.-A., HÖFT, A. (2009), Land Use, Crop Rotation, Eco-system Services and Programming: On the Spatial and Dynamic Modelling of Farms in Cultural Landscapes. ESEE 2009, 8th International Conference of the European Society for Ecological Economics, Transformation, Innovation and Adaptation for Sustainability 29th June -2nd July, Ljubljana, Slovenia, PS5A8: Parallel session -Agri-Environmental Measures II, http://www.esee2009.si/ESEE2009.html.