Third-party Funded Collaborative Research Projects

Research Training Group "GlobalFood" (RTG 1666): Transformation of Global Agri-Food Systems: Trends, Driving Forces, and Implications for Developing Countries

Collaborative Research Center "EFForTS" (CRC 990): Ecological and Socio-economic Functions of Lowland Rainforest Transformation Systems (Sumatra, Indonesia)

Agriculture and Dietary Diversity in Africa "ADDA" funded by the German Federal Ministry of Food and Agriculture

Research Unit (FOR 2432): Social-Ecological Systems in the Indian Rural-Urban Interface: Functions, Scales, and Dynamics of Transition


Selected Publications
Romero, C., M. Wollni (forthcoming): Opportunistic behaviour and trust: Experimental results from broccoli farmers in Ecuador. Journal of Agricultural Economics

Romero, C., M. Wollni (forthcoming): Dynamics of smallholder participation in horticultural export chains – evidence from Ecuador. Agricultural Economics

Krumbiegel, K., M. Maertens, M. Wollni (2018): The role of Fairtrade certification for wages and job satisfaction of plantation workers. World Development 102: 195-212

Murendo, C., M. Wollni, A. de Brauw, N. Mugabi (2018): Social network effects on mobile money adoption in Uganda. Journal of Development Studies, 54(2): 327-342

Vorlaufer, M., M. Ibanez, B. Juanda, M. Wollni (2017): Conservation versus equity: Can payments for environmental services achieve both? Land Economics 93(4): 667-688

Gerard, A., M. Wollni, D. Hölscher, B. Irawan, L. Sundawati, M. Teuscher, H. Kreft (2017): Oil-palm yields in diversified plantations: initial results from a biodiversity enrichment experiment in Sumatra, Indonesia. Agriculture, Ecosystems and Environment 240: 253-260

Gatto, M., M. Wollni, R. Asnawi, M. Qaim (2017): Oil palm boom, contract farming, and rural economic development: village-level evidence from Indonesia. World Development 95: 127-140

Kunte, S., M. Wollni, C. Keser (2017): Making it personal: breach and private ordering in a contract farming experiment. European Review of Agricultural Economics 44(1): 121-148

Handschuch, C., M. Wollni (2016): Improved production systems for traditional food crops: The case of finger millet in western Kenya. Food Security 8(4): 783-797

Handschuch, C., Wollni, M. (2016): Traditional food crop marketing in Sub-Saharan Africa: does gender matter? Journal of Development Studies, 52(3), 343-359

Teuscher, M., Vorlaufer, M., Wollni, M., Brose, U., Mulyani, Y. Clough, Y (2015): Trade-offs between bird diversity and abundance, yields and revenue in smallholder oil palm plantations in Sumatra, Indonesia. Biological Conservation 186, 306-318

Gatto, M., M. Wollni, M. Qaim (2015): Oil Palm Boom and Land-Use Dynamics in Indonesia: The Role of Policies and Socioeconomic Factors. Land Use Policy 46, 292-303

Wollni, M. and E. Fischer (2015): Member Deliveries in Collective Marketing Relationships: Evidence from Coffee Cooperatives in Costa Rica. European Review of Agricultural Economics. 42(2): 287-314

Holzapfel, S. and M. Wollni: Is GlobalGAP certification of small-scale farmers sustainable? Evidence from Thailand. Journal of Development Studies 50(5), 2014, 731-747

Wollni, M. and C. Andersson: Spatial patterns of organic agriculture adoption: evidence from Honduras. Ecological Economics 97, 2014, 120-128

Holzapfel, S. and M. Wollni: Innovative business models in the Thai horticultural sector: a panel data analysis of the impacts of GlobalGAP certification. In: Christy, R.D.D., C.A. da Silva, N. Mhlanga, K. Tihanyi, and E. Mabaya (eds.): Innovative institutions, public policies and private strategies for agro-enterprise development. World Scientific Publishing Co. Inc.: June 2014

Handschuch, C., M. Wollni, and P. Villalobos: Adoption of Food Safety and Quality Standards among Chilean Raspberry Producers. Do Smallholders Benefit? Food Policy 40, 2013: 64-73

Handschuch, C., M. Wollni, and A.M. Corrêa Neto: Knowledge and implementation of HACCP-based management systems among small-scale honey producers in Brazil. Journal on Chain and Network Science 12 (1), 2012: 55-66

Kersting, S. and M. Wollni: New institutional arrangements and standard adoption: evidence from small-scale fruit and vegetable farmers in Thailand. Food Policy 37(4), 2012: 452-462

Wollni, M., and B. Brümmer: Productive efficiency of specialty and conventional coffee farmers in Costa Rica: Accounting for technological heterogeneity and self-selection. Food Policy 37(1), 2012: 67-76

Wollni, M., D.R. Lee, and J.E. Thies: Conservation agriculture, organic marketing, and collective action in the Honduran hillsides. Agricultural Economics 41, 2010: 373-384

Wollni, M., and M. Zeller: Do farmers benefit from participating in specialty markets and cooperatives? The case of coffee marketing in Costa Rica. Agricultural Economics 37, 2007: 243-248

Zeller, M., M. Wollni and A.A. Shaban: Evaluating the poverty outreach of development programs. Empirical evidence from Indonesia and Mexico. Quarterly Journal of International Agriculture 42, 2003: 371-383