Akoyi, K. T, and M. Maertens, 'Walk the Talk: Private Sustainability Standards in the Ugandan Coffee Sector', The Journal of Development Studies, 2017, pp. 1-27.
Asfaw, S., D. Mithoefer, and H. Waibel, 'EU Private Agrifood Standards in African High Value Crops: Pesticide Use and Farm-level Productivity', 12th Congress of the European Association of Agricultural Economists (EAAE), 2008, pp. 26-29.
Barham. B. L., and J. G. Weber, 'The Economic Sustainability of Certified Coffee: Recent Evidence from Mexico and Peru', World Development, vol. 40, no. 6, 2012, pp. 1269-1279.
Becchetti, L. and S. Castriota, 'Is Fair Trade Honey Sweeter? An Empirical Analysis on the Effect of Affiliation on Productivity', CEIS Tor Vergata Research Paper Series, vol. 7, no. 141, 2009, pp. 1-37.
Becchetti, L., P. Conzo, and F. Pisani, 'Market Access, Organic Farming and Productivity: the Effects of Fair Trade Affiliation on Thai Farmer Producer Groups', The Australian Journal of Agriculture and Resource Economics, vol. 56, 2011, pp. 117-140.
Bennett, M. et al., 'Cote d'Ivoire Cocoa: COSA Survey of Rainforest Alliance Certified Farms', Committee on Sustainability Assessment, 2012, pp. 45.
Brako, D.E., Richard, A. and Alexandros, G. Do voluntary certification standards improve yields and wellbeing? Evidence from oil palm and cocoa smallholders in Ghana. International Journal of Agricultural Sustainability, 19(1), 2021, pp.16-39.
Chiputwa, B. D. Spielman, and M. Qaim, 'Food Standards, Certification, and Poverty among Coffee Farmers in Uganda', World Development, no. 66, 2015, pp. 400-412.
Dietz, T., Estrella Chong, A., Grabs, J. and Kilian, B.,. How effective is multiple certification in improving the economic conditions of smallholder farmers? Evidence from an impact evaluation in Colombia's Coffee Belt. The Journal of Development Studies, 56(6), 2020, pp.1141-1160.
Doanh, N. K., Thuong, N. T. T., Heo, Y., 'Impact of Conversion to Organic Tea Cultivation on Household Income in the Moutainous Areas of Northern Vietnam', Sustainability, vol. 10, no. 12, 2018, pp. 4475-4496.
Eyhorn, F., et al., 'Does Organic Farming Provide a Viable Alternative for Smallholder Rice Farmers in India?', Sustainability, vol. 10, 2018, pp. 4424-4439.
Fenger, N. A., et al., 'The Impact of Certification on the Natural and Financial Capitals of Ghanaian Cocoa Farmers', Agroecology and Sustainable Food Systems, vol. 41, no. 2, 2017, pp. 143-166.
Fort, R. and R. Ruben, 'The Impact of Fair Trade on Banana Producers in Northern Peru', in R. Ruben (ed.), The Impact of Fair Trade, Wageningen, Wageningen Academic Publishers, 2008, pp. 49-74.
Froehlich, A. G., et al., 'Comparing the Profitability of Organic and Conventional Production in Family Farming: Empirical Evidence from Brazil', Ecological Economics, vol. 150, 2018, pp. 307-314.
Girma, J., and C. Gardebroek, 'The Impact of Contracts on Organic Honey Producers' Incomes in Southwestern Ethiopia', Forest Policy and Economics, vo. 50, 2015, pp. 259-268.
Hoebink, P., et al., 'The Impact of Coffee Certification on Smallholder Farmers in Kenya, Uganda, and Ethiopia', Center for International Development Issues Nijmegen (CIDIN), 2014, pp. 235.
Ibanez, M., and A. Blackman, 'Is Eco-Certification a Win-Win for Developing Country Agriculture? Organic Coffee Certification in Columbia', World Development, vol. 82, 2016, pp. 14-27.
Iddrisu, M., Aidoo, R. and Abawiera Wongnaa, C., 'Participation in UTZ-RA voluntary cocoa certification scheme and its impact on smallholder welfare: Evidence from Ghana', World Development Perspectives, 20, 2020.
Ingram, V. et al., 'Towards Sustainable Cocoa in Cote d'Ivoire', Wageningen Economic Research, vol. 41, 2018, pp. 1-138.
Ingram, V., et al., 'The Impacts of Cocoa Sustainability Initiatives in West Africa', Sustainability, vol.10, no. 11, 2018, pp. 4249-4269.
Jena, P. R. et al., 'The Impact of Coffee Certification on Small-scale Producers' Livelihoods: A Case Study from the Jimma Zone, Ethiopia', Journal of Agricultural Economics, vol. 43, 2012, pp. 429-440.
Jena, P. R., and U. Grote, 'Fairtrade Certification and Livelihood Impacts on Small-scale Coffee Producers in a Tribal Community of India', Applied Economic Perspectives and Policy, vol. 39, no. 1, 2017, pp. 87-110.
Jena, P. R., et al., 'Can Coffee Certification Schemes Increase Incomes of Smallholder Farmers? Evidence from Jinotega, Nicaragua', Environment, Development, and Sustainability, vol. 19, pp. 45-66.
Kamau, M. W. et al., 'The Impact of Certification on Smallholder Coffee Farmers in Kenya: The Case of 'UTZ' Certification Program', The Joint 3rd African Association of Agricultural Economists (AAAE) and 48th Agricultural Economists Association of South Africa (AEASA) Conference, Cape Town, South Africa, September 19-23, 2010.
Karki, S.K., Jena, P. R., and Grote, U., 'Fair Trade Certification and Livlihoods: A Panel Data Analysis of Coffee-growing Households in India', Agricultural and Resource Economics Review, vol.45, no. 3, 2016, pp. 436-458.
Kuit, M., L. Guinee, and P. Van Anh, 'Estimating the Impact of Implementation of the 4C Entry Level Standard in Uganda and Vietnam', Kuit Consultancy, 2016, pp. 78.
Minten, B., et al., 'Tracking the Quality Premium of Certified Coffee: Evidence from Ethiopia', World Development, vol. 101, 2018, pp. 119-132.
Mitiku, F., et al., 'Certification of Semi-forest Coffee as a Land-sharing Strategy in Ethiopia', Ecological Economics, vol. 145, 2018, pp. 194-204.
Mitiku, F., et al., 'Do Private Sustainability Standards Contribute to Income Growth and Povery Alleviation? A Comparison of Different Coffee Certification Schemes in Ethiopia', Sustainability, vol.9, no. 2, 2017, pp. 246-267.
Morgans, C. L. et al., 'Evaluating the Effectiveness of Palm Oil Certification in Delivering Multiple Sustainability Objectives', Environmental Research Letters, vol. 13, 2018, pp. 064302-064314.
Mueller, A. K., and L. Theuvsen, 'Financial Literacy and Food Safety Standards in Guatemala: The Heterogeneous Impact of GlobalGAP on Farm Income', GlobalFood Discussion Papers, no. 63, 2015, pp. 48.
Nelson, V. et al., 'Fairtrade Coffee: A Study to Assess the Impact of Fairtrade for Coffee Smallholders and Producer Organizations in Indonesia, Mexico, Peru, and Tanzania', Natural Resources Institute, University of Greenwich, Chatham, UK, 2016, pp. 1-187.
Nelson, V., et al., 'Assessing the Poverty Impact of Sustainability Standards: Fairtrade in Ghanaian Cocoa', Natural Resources Institute , University of Greenwich, 2013.
Parvathi, P. and H. Waibel, 'The Impact of Certification on Material Input Costs in India', in P. Parvathi, U. Grote, and H. Waibel (eds.), Fair Trade and Organic Agriculture: A Winning Combination? Boston, CABI, 2018, pp. 130-140.
Parvathi, P. and Waibel, H., 'Is Organic Agriculture and Fair Trade Certification a Way Out of Crisis? Evidence from Black Pepper Farmers in India', GEWISOLA Annual Conference Proceedings, 2015, pp. 1-28.
Parvathi, P., and H. Waibel, 'Organic Agriculture and Fair Trade: A Happy Marriage? A Case Study of Certified Smallholder Black Pepper Farmers in India', World Development, vol. 77, 2016, pp. 206-220.
Qiao, Y., et al. 'Assessing the Social and Economic Benefits of Organic and Fair Trade Tea Production for Small-scale Farmers in Asia: A Comparative Case Study of China and Sri Lanka', Renewable Agriculture and Food Systems, vol. 31, no. 3, 2016, pp. 246-257.
Qiao, Y., et al., 'Certified Organic Agriculture as an Alternative Livelihood Strategy for Small-scale Farmers in China: A Case Study in Wanzai County, Jiangzi Provice', Ecological Economics, vol. 145, 2018, pp. 301-307.
Resende Fiho, M. A., et al., 'Economic and Productivity Incentives to Produce Organically in Brazil: Evidence from Strawberry Production in the Federal District', Renewable Agriculture and Food Systems, vol. 34, no. 2, 2019, pp. 155-168.
Riisgaard, L., et al., 'The Performance of Voluntary Standard Schemes from the Perspective of Small Producers in East Africa', Danish Institute for International Studies, Copenhagen, 2009, pp. 63.
Ruben, R., and G. Zuniga, 'How Standards Compete: Comparative Impact of Coffee Certification Schemes in Northern Nicaragua', Supply Chain Management: An International Journal, vol. 21, no. 3, 2011, pp. 490-509.
Ruben, R., and R. Fort, 'The Impact of Fair Trade Certification for Coffee Farmers in Peru', World Development, vol. 40, no. 3, 2012, pp. 570-582.
Sinaga, S.V. et al., 'The analysis of propensity score matching on the economic effect of C.A.F.E. Practices Certification toward Lintong coffee farming in North Sumatra', AGRISEP, vol. 18, no. 1, 2019, pp. 139-152.
Subervie, J., and I. Vagneron, 'A Drop of Water in the Indian Ocean? The Impact of GlobalGap Certification on Lychee Farmers in Madagascar', World Development, vol. 50, 2013, pp. 57-73.
van Rijsbergen, B. T. et al., 'The Ambivalent Impact of Coffee Certification on Farmers' Welfare: A Matched Panel Approach for Cooperatives in Central Kenya', World Development, vol. 77, 2016, pp. 277-292.
Vanderhaegen, K., et al., 'Do Private Coffee Standards 'Walk the Talk' in improving Socio-economic and Environmental Sustainability?', Global Environmental Change, vol. 51, 2018, pp. 1-9.
Vellema, W., et al., 'The Effect of Specialty Coffee Certification on Household Livelihood Strategies and Specialisation', Food Policy, vol. 57, 2015, pp. 13-25.
Waarts, Y. et al., 'Impact of UTZ Certification on Cocoa Producers in Ghana, 2011 to 2014', LEI Wageningen UR, Den Haag, 2015, pp. 1-47.
Weber, J. G., 'How Much More Do Growers Receive For Fair Trade-Organic Coffee?', Food Policy, vol. 36, 2011, pp. 678-685.
Zulfiqar, F., & G. B. Thapa, 'Is 'Better Cotton' Better Than Conventional Cotton in Terms of Input Use Efficiency and Financial Performance?', Land Use Policy, vol. 52, 2016, pp. 136-143.