Teaching:

Agriculture, Environment and Development, Agriculture and Nature Conservation

Publications:

Wätzold, M. Y. L., Krumbiegel K., Tillie P., Wollni M. (2026) Agroforestry as a climate change
adaptation strategy: Evidence from Ghana’s cocoa sector. Agricultural Systems, 231, 104519.
https://doi.org/10.1016/j.agsy.2025.104519

Wätzold, M. Y. L., Abdulai, I., Cooke, A., Krumbiegel, K., Ocampo-Ariza, C., Wenzel, A.,
Wollni, M. (2025). Do voluntary sustainability standards improve socioeconomic and ecological
outcomes? Evidence from Ghana's cocoa sector. Ecological Economics, 229, 108474.
https://doi.org/10.1016/j.ecolecon.2024.108474

Wollni, M., Bohn, S., Ocampo‐Ariza, C., Paz, B., Santalucia, S., Squarcina, M., Umarishavu, F.,
Wätzold, M. Y. L. (2025). Sustainability standards in agri‐food value chains: Impacts and
trade‐offs for smallholder farmers. Agricultural Economics, e70005.
https://doi.org/10.1111/agec.70005

Wätzold, M. Y. L., Cooke, A., Ocampo-Ariza, C., Umarishavu, F., Wollni, M. Voluntary
sustainability standards and socioeconomic and ecological outcomes: Panel evidence from
Rwanda’ coffee sector. SustainableFood Discussion Paper 28, University of Goettingen.
https://doi.org/10.47952/gro-publ-345, submitted to World Development

Umarishavu, F., Bradaczek, R., Clavero, R., Collignon, Q., Lieke, S.-D., Wätzold, M.Y.L., van
Weert, P., Wollni, M. (2025). Breaking Barriers: Enhancing Smallholder Farmers’ Inclusion in
Voluntary Sustainability Standards. SustainableFood Discussion Policy Brief 1,
doi.org/10.47952/gro-publ-314