Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Agent-Based Simulation of Local Soy Value Chains in Ghana
Verwaart, Tim ; Dijkxhoorn, Youri ; Plaisier, Christine ; Wagenberg, Coen Van - \ 2019
In: Progress in Artificial Intelligence. - Springer (Progress in Artificial Intelligence ) - ISBN 9783030302436 - p. 654 - 666.
The assessment of changes in the relationships between supply chain agents is considered fundamental for market transformation. This paper reports on the application of a Value Chain Lab that supports the measurement of behavioral change in vertically structured supply-chain relationships. A participative gaming approach is used that enables to identify changes in mutual trust, transaction costs and risk behavior that result from value chain support and co-operation. The Value Chain Lab comprises value chain analysis, value chain games and multi-agent simulation. The paper describes the multi-agent simulation of a soy value chain in northern Ghana. The research was conducted in the context of the 2SCALE program, aiming to improve rural livelihoods and food and nutrition security in a number of African countries by developing agricultural supply chains including local smallholder farmers. The study confirms the positive effects of trust and loyalty in value chain relationships. Furthermore, it demonstrates the usefulness of agent-based simulations for exploring potential consequences of alternative interventions.
Towards a sustainable sugarcane industry in India : mid-term results of the Solidaridad programme: Increasing water use efficiency in sugarcane growing in India through adoption of improved practices and technologies
Plaisier, C. ; Janssen, V. ; Rijn, F. van - \ 2019
Wageningen : Wageningen Economic Research (Wageningen Economic Research report 2019-032) - 55
Towards a sustainable sugarcane industry in India appendices : Mid-term results on Solidaridad’s programme: Increasing water use efficiency in sugarcane growing in India
Plaisier, C. ; Janssen, V. ; Rijn, F. van - \ 2019
Wageningen : Wageningen Economic Research (Wageningen Economic Research report 2019-032b) - 52
How do trust, social norms and risk attitudes influence sustained adoption of interventions to reduce post-harvest losses?: application of an Agent-Based Model to the tomato value chain in Nigeria
Wagenberg, Coen van; Oudendag, Diti ; Dijkxhoorn, Youri ; Plaisier, Christine ; Groot, Jim ; Kok, Melanie - \ 2019
Wageningen : Wageningen Economic Research (Wageningen Economic Research report 2019-049) - ISBN 9789463439893 - 36
Transporting fresh tomatoes from farmer to retailer in Nigeria in plastic crates instead of raffia baskets can substantially decrease post-harvest losses both in quantity and in quality. We apply the Value Chain Laboratory (VC-Lab) method to analyse the importance for the long-term acceptance of these plastic crates of trust in other chain actors, risk attitudes and social norms of chain actors, a price bonus for transporting tomatoes in crates, the costs and lifespan of crates, and who should invest in crates. The price a farmer receives from a wholesaler, risk attitudes of the actors, and social norms were the most important drivers for the long-term use of crates.
Empowering smallholder farmers in markets through collaborative demand-driven research : assessment ESFIM Research Support Fund
Plaisier, Christine ; Haak, Kirsten ; Ton, G. ; Beukers, R. - \ 2019
Wageningen : Wageningen Economic Research (Report / Wageningen Economic Research 2019-030) - ISBN 9789463439244 - 81
Minder vliegen: makkelijker gezegd dan gedaan
Leemans, Rik ; Wals, Arjen ; Schroen, Karin ; Plaisier, Christine ; Zanten, Hannah van - \ 2019
A measurement tool on food losses and waste : applied in a tomato value chain in Nigeria
Kok, Melanie G. ; Groot, Jim J. ; Dastoum, Sara ; Plaisier, Christine ; Dijkxhoorn, Youri ; Wagenberg, Coen P.A. - \ 2019
Wageningen : Wageningen Food & Biobased Research (Wageningen Food & Biobased Research report 1906) - ISBN 9789463435895 - 28
The Basophil Activation Test reduces the need for a food challenge test in children suspected of IgE-mediated cow's milk allergy
Ruinemans-Koerts, Janneke ; Schmidt-Hieltjes, Yvonne ; Jansen, Ad ; Savelkoul, Huub F.J. ; Plaisier, Annejet ; Setten, Petra van - \ 2019
Clinical and Experimental Allergy 49 (2019)3. - ISSN 0954-7894 - p. 350 - 356.

Background: The gold standard for the diagnosis of cow's milk allergy is the Double-Blind Placebo-Controlled Food Challenge (DBPCFC) test. However, disadvantages of the DBPCFC are the potential risk of anaphylactic reactions, the time-consuming procedure and high costs. Objective: The aim of this study was to determine the reliability of the Basophil Activation Test (BAT) both for the initial diagnosis of cow's milk allergy in children and for the determination of tolerance in children with cow's milk allergy. Methods: Ninety-seven BATs and cow's milk-specific IgE (sIgE) tests were performed in 86 infants/young children, suspected of (persistent) cow's milk allergy, who were qualified for an in-hospital DBPCFC. The BAT was performed with cow's milk extract and the purified major allergens casein, α-lactalbumin, β-lactoglubulin. Basophil activation was determined by CD63 upregulation measured by flow cytometry. The BAT results were compared to the DBPCFC outcomes. Results: Based on unequivocal DBPCFC and BAT result combinations (80%), the BAT had a sensitivity and specificity of 100% (CI: 86%-100% and 68%-100%, respectively) in IgE-sensitized children (41% of the tested children). All non-IgE-sensitized children (59%) had a negative DBPCFC and BAT, except for five patients. These latter showed delayed and relatively mild symptoms in the DBPCFC with a negative BAT, supporting a non-IgE-mediated allergy in these children. Conclusions and Clinical Relevance: The BAT seems reliable and cost-effective to diagnose patients with an IgE-mediated cow's milk allergy. In IgE-sensitized patients, a BAT might replace a DBPCFC. For non-IgE-sensitized patients presenting with mild symptoms, we propose to consider a (double-blind) extended (time) challenge test at home.

A Systems Approach to Food Loss and Solutions : Understanding Practices, Causes, and Indicators
Verma, Monika ; Plaisier, Christine ; Wagenberg, C.P.A. van; Achterbosch, T.J. - \ 2019
Sustainability 11 (2019)3. - ISSN 2071-1050
Reasons behind food loss can be very specific for each product and supply chain stage but it is also affected by factors independent of the product and stage. This work focuses on such generic factors and develops a framework to analyze food loss as a systemic outcome. The framework highlights the interconnected nature of problem across supply chain stages and therefore emphasizes the need to look at the whole system instead of specific stages, when proposing solutions. Practices and underlying causes contributing to food loss are identified for each stage of
the supply chain using a literature search. Deductive logic is used to fill the gaps where literature was found to be scarce, and to derive socio-economic indicators that signal the presence of identified causes. Using this framework, we propose a non-exhaustive list of 30 socio-economic indicators, which can signal the presence of the 22 practices and 60 causes associated with food loss in supply
chains. This list can serve as a starting list for practitioners and policymakers to build on when analyzing food losses in supply chains in their region. We evaluate the framework using a fieldstudy of a tomato supply chain in Nigeria, and conclude that it can be a useful tool to identify practices, causes, and indicators of food loss.
Approach for designing context-specific, locally owned interventions to reduce postharvest losses : Case study on tomato value chains in Nigeria
Plaisier, Christine ; Sibomana, Milindi ; Waal, Johannes van der; Clercx, Luud ; Wagenberg, Coen P.A. van; Dijkxhoorn, Youri - \ 2019
Sustainability 11 (2019)1. - ISSN 2071-1050 - 16 p.
Behavioural change - Context-specific interventions - Nigeria - Participatory approach - Plastic crate - Postharvest losses - Raffia basket - Supply chain - Tomato - Value chain development

Development projects on interventions to reduce postharvest losses (PHL) are often implemented largely independently of the specific context and without sufficient adaptation to the needs of people who are supposed to use them. An approach is needed for the design and implementation of specific, locally owned interventions in development projects. Our approach is based on Participatory Development and includes Living Lab and World Cafés. We applied the approach in a case study on reducing PHL in tomato value chains in Nigeria. The approach consists of nine steps. After scoping the sector, selected value chain stakeholders (case: farmers, transporters, traders, retailers) were gathered in Living Lab workshops. In the workshop, participants analyzed the product, information, and monetary flows in their own value chain, identified causes for PHL, and selected potential interventions to reduce these (case: plastic crates instead of raffia baskets to transport tomatoes). Selected interventions were implemented, tested, and monitored in pilot projects with the workshop participants. This was followed by an evaluation workshop. At the end of the case study, 89% of participants bought crates to keep using them in their value chain. Our approach resulted in context-specific, locally owned interventions to reduce PHL in the case study on tomato value chains in Nigeria. Its application in other countries, commodities, or interventions is needed to determine the effectiveness of the approach in a broader scope.

Enhancing food systems in Nigeria : Scope and perspective for Dutch policy interventions
Posthumus, Helena ; Dengerink, Just ; Dhamankar, Mona ; Plaisier, Christine ; Baltissen, Gerard - \ 2018
Wageningen : Wageningen University & Research - 97
Measuring post-harvest losses in the tomato value chain, pilot I results
Plaisier, Christine - \ 2018
Towards healthier & sustainable food systems in urbanising world : Findings and recommendations from Expert Seminar held on 19-10-2018 at WICC, Wageningen
Lokers, R.M. ; Plaisier, Christine ; Ruben, R. ; Venema, G.S. ; Herens, M.C. ; Bosch, D.R.B. ; Haas, W. de; Dijkshoorn-Dekker, M.W.C. ; Linderhof, Vincent ; Groot, J. ; Achterberg, T. ; Stuiver, M. - \ 2018
Wageningen Economic Research - 14 p.
Looking back at: Foodsystems in an urbanising world
Plaisier, Christine - \ 2018
Wageningen Economic Research
October 19, 2018, Wageningen University and Research organised the Seminar ‘Towards healthy & sustainable food systems in an urbanising world’. The Seminar was established by the WUR Knowledge Base Programmes of Global Food & Nutrition Security’ and ‘Metropolitan Solutions’. Programmes supported by the Dutch Ministry of Agriculture, Nature and Food Quality.
The challenge of food systems research : What difference does it make?
Ruben, Ruerd ; Verhagen, Jan ; Plaisier, Christine - \ 2018
Sustainability 11 (2018)1. - ISSN 2071-1050
3I Approach - Feedbacks & interlinkages - Food policy - Food systems - Interdisciplinary research

Recent discussions on the results of food security programs devote key attention to complex interactions between policy interventions and business innovation for improving nutrition outcomes. This shift from linear approaches of food and nutrition security towards a more interlinked and nested analysis of food systems dynamics has profound implications for the design and organization of research and innovation processes. In this article we outline our experience with interdisciplinary and interactive processes of food systems analysis at different scale levels, paying systematic attention to three critical system interfaces: intersections with other systems, interactions within the food system, and incentives for food system innovations (the so-called: 3I approach). We discuss the importance of these interfaces for leveraging food system adaptation and managing food system transformation. We also provide illustrative examples of the relevance of food systems analysis for the identification of appropriate and effective programs for reinforcing the resilience, responsiveness and inclusiveness of novel food and nutrition programs.

Assessment of vegIMPACT potato trainings in Garut and Pangalengan
Pronk, Annette ; Plaisier, Christine ; Gunadi, Nikardi ; Brink, Lubbert van den; Moekasan, Tony K. ; Prabaningrum, L. ; Karjadi, Sih K. ; Dijkxhoorn, Youri ; Medah, Junike ; Puister, Linda ; Hengsdijk, Huib - \ 2018
Wageningen : Wageningen UR (VegIMPACT report 46) - 66
CGIAR FS4HD Reduce postharvest losses of vegetables for healthier urban consumption : Deliverable 1: Tomato as selected vegetable for impact assessment of intervention to reduce postharvest losses
Wagenberg, C.P.A. van; Plaisier, Christine ; Dijkxhoorn, Y. ; Groot, J.J. ; Gogh, J.B. van - \ 2017
Wageningen Economic Research - 7 p.
Assessment of horticulture product and market development : vegIMPACT PMC interventions in Java and Sulawesi
Plaisier, Christine ; Dijkxhoorn, Y. ; Medah, Junike ; Hengsdijk, H. - \ 2017
vegIMPACT (vegIMPACT Report 47) - 56 p.
vegIMPACT: Knowledge Transfer : Improving vegetable production by smallholder farmers in Indonesia
Plaisier, C. ; Dijkxhoorn, Y. ; Medah, J. ; Dengerink, J. ; Koster, T. ; Hengsdijk, H. ; Koesveld, F. van - \ 2017
The Hague : Wageningen Economic Research (Wageningen Economic Research report 2017-115) - ISBN 9789463438162 - 71
Value chain laboratory : alternative evaluation method for assessing value chain dynamics
Dijkxhoorn, Youri ; Plaisier, Christine ; Wagenberg, Coen van; Verwaart, Tim ; Verstegen, Jos ; Ruben, Ruerd ; Oldenhof, Ruben - \ 2017
Wageningen : Wageningen Eonomic Research (Wageningen Eonomic Research report 2017-031) - ISBN 9789463436465 - 75
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