Subscribe

Back

Who we are

With research staff from more than 70 countries, and offices across the globe, IFPRI provides research-based policy solutions to sustainably reduce poverty and end hunger and malnutrition in developing countries.

researcher spotlight

David Spielman

David Spielman is the director of IFPRI’s Innovation Policy and Scaling Unit and has been with the institute since 2004. His research agenda covers a range of topics including agriculture and rural development policy; agricultural science, technology, and innovation; plant genetic resources and seed systems; agricultural extension and advisory services; and community-driven rural development.

Back

What we do

Since 1975, IFPRI’s research has been informing policies and development programs to improve food security, nutrition, and livelihoods around the world.

Research topics

Projects and impact

Food Security Portal

Modeling tools

What’s new

Where we work

Back

Where we work

IFPRI currently has more than 480 employees working in over 70 countries with a wide range of local, national, and international partners.

IFPRI Regional Programs

IFPRI Country and Regional Offices

Research by country and region

Subscribe

experts

Innovation Policy and Scaling

Bjorn Van Campenhout

Research Fellow

Follow

Bjorn

at:

ORCiD

Bio

Bjorn Van Campenhout is a Research Fellow in the Innovation Policy and Scaling Unit. He is also an Associate Research Fellow at the LICOS Centre for Institutions and Economic Performance of the KU Leuven, Belgium.  His research focuses on smallholder agriculture, especially in East Africa. He has published on food market integration and smallholder market participation. Recently, he has been investigating the potential of information and communication technologies (ICT) to make agricultural extension more inclusive and effective. He earned a PhD from KU Leuven, Belgium.

Publications

Personal Website

CV

Publications

Resource thumbnail

Working Paper

When the cure is worse than the disease: Acaricide use, tick resistance, and systemic constraints in Uganda’s dairy sector

2025Kariuki, Sarah; Muteti, Francisca N.; Vudriko, Patrick; Ariong, Richard M.; Van Campenhout, Bjorn; Chamberlin, Jordan
Details

When the cure is worse than the disease: Acaricide use, tick resistance, and systemic constraints in Uganda’s dairy sector

The Ugandan dairy sector has expanded rapidly in recent years. However, ticks and tick-borne diseases pose increasing challenges to this progress, exacerbated by the rise in resistance to acaricides, the primary method for tick control. This paper examines the systemic constraints that undermine effective, safe, and sustainable tick control in Uganda’s liberalized dairy system. Drawing on multiple complementary data sources—including household surveys, exit interviews, list experiments, and covert audit methods—we show that the de facto farmer-led model of tick control is characterized by failures in information, coordination challenges, imperfect input markets, and weak regulation. Farmers operate with limited technical knowledge and minimal advisory support, and under extensive grazing systems and frequent inter-herd contact that require coordinated approaches to tick control. Input markets provide access to acaricides, but little guidance on proper use. As a result, misuse and overuse of chemicals are widespread, generating risks for animal and human well-being, food safety, and environmental integrity. Addressing these constraints will require integrated interventions that strengthen extension and regulatory capacity, improve accountability in veterinary input markets, and foster community-level coordination to ensure safe and sustainable tick control.

Year published

2025

Authors

Kariuki, Sarah; Muteti, Francisca N.; Vudriko, Patrick; Ariong, Richard M.; Van Campenhout, Bjorn; Chamberlin, Jordan

Citation

Kariuki, Sarah; Muteti, Francisca N.; Vudriko, Patrick; Ariong, Richard M.; Van Campenhout, Bjorn; and Chamberlin, Jordan. 2025. When the cure is worse than the disease: Acaricide use, tick resistance, and systemic constraints in Uganda’s dairy sector. IFPRI Discussion Paper 2389. Washington, DC: International Food Policy Research Institute. https://hdl.handle.net/10568/179187

Country/Region

Uganda

Keywords

Eastern Africa; Sub-saharan Africa; Africa; Dairy Industry; Value Chains; Tickborne Diseases; Animal Diseases; Ticks; Behaviour; Parasite Control; Acaricides; Farm Inputs

Language

English

Access/Licence

Open Access

Source

Source record

Project

Rethinking Food Markets

Record type

Working Paper

Resource thumbnail

Journal Article

Buyer-side gender discrimination in bargaining: Evidence from seed sales in Uganda

2025Van Campenhout, Bjorn; Nabwire, Leocardia
Details

Buyer-side gender discrimination in bargaining: Evidence from seed sales in Uganda

Haggling over prices is a common feature of economic transactions in many societies. This study examines whether the gender of the seller influences buyers’ negotiation strategies and outcomes in bilateral price bargaining. Using a bargaining experiment in eastern Uganda, we analyze interactions between smallholder maize farmers and either a male or female seed seller. Our findings reveal that buyers negotiating with female sellers are less likely to accept the initial offer price and respond with lower counter-bids compared to those bargaining with male sellers. Negotiations also last, on average, one round longer when the seller is a woman, and final transaction prices are nearly 9 percent lower. These results are particularly relevant for rural economies, where restrictive gender norms limit women’s financial autonomy. Given that small agribusinesses often provide one of the few viable income-generating opportunities for women, gender biases in market interactions can have substantial implications for economic empowerment and household welfare.

Year published

2025

Authors

Van Campenhout, Bjorn; Nabwire, Leocardia

Citation

Van Campenhout, Bjorn; and Nabwire, Leocardia. 2025. Buyer-side gender discrimination in bargaining: Evidence from seed sales in Uganda. Journal of Behavioral and Experimental Economics 119(December 2025): 102404. https://doi.org/10.1016/j.socec.2025.102404

Country/Region

Uganda

Keywords

Eastern Africa; Sub-saharan Africa; Africa; Gender; Discrimination; Seeds; Bargaining Power

Language

English

Access/Licence

Open AccessCC-BY-4.0

Links

https://doi.org/10.1016/j.socec.2025.102404 Source record

Project

Market Intelligence

Record type

Journal Article

Resource thumbnail

Working Paper

Signaling, screening, or sunk costs? Experimental evidence on how prices affect agricultural technology adoption in East Africa

2025Van Campenhout, Bjorn; Abate, Gashaw T.; Colen, Liesbeth; Kramer, Berber
Details

Signaling, screening, or sunk costs? Experimental evidence on how prices affect agricultural technology adoption in East Africa

Free samples are a widely used strategy to introduce new products or technologies, offering prospective users the opportunity to gain firsthand experience and potentially facilitate diffusion through social networks. However, concerns remain that giving away products for free may reduce their perceived value, increasing the risk that recipients will underutilize, repurpose, or resell the product rather than use it for its intended purpose. We explore three mechanisms through which charging a positive price may increase uptake, intended use and subsequent adoption of a new technology: (1) a signaling effect, where a positive price conveys higher product quality; (2) a screening effect, whereby payment deters users who do not value the product and targets those more likely to use it; and (3) a sunk cost effect, where paying a positive price induces a psychological commitment to use. We test how these pricing mechanisms shape uptake, use, and subsequent adoption of recently released seed varieties of staple food crops, drawing on a field experiment with smallholder farmers in Uganda and Ethiopia. We find that willingness to pay is a reliable predictor of subsequent use of seed trial packs, pointing to the value of modest prices for targeting likely adopters. At the same time, sunk cost effects are context specific and often negative, suggesting that charging farmers can reduce their ability or willingness to experiment. These findings carry important implications for how pricing strategies can be designed to promote technology adoption in low-income settings.

Year published

2025

Authors

Van Campenhout, Bjorn; Abate, Gashaw T.; Colen, Liesbeth; Kramer, Berber

Citation

Van Campenhout, Bjorn; Abate, Gashaw T.; Colen, Liesbeth; and Kramer, Berber. 2025. Signaling, screening, or sunk costs? Experimental evidence on how prices affect agricultural technology adoption in East Africa. IFPRI Discussion Paper 2369. Washington, DC: International Food Policy Research Institute.

Country/Region

Uganda; Ethiopia

Keywords

Africa; Eastern Africa; Sub-saharan Africa; Technology Adoption; Prices; Crops; Seeds; Costs; Agricultural Technology

Language

English

Access/Licence

Open Access

Source

Source record

Project

Market Intelligence

Record type

Working Paper

Blogs

When milk quality pays: Evidence from an incentive experiment in Uganda
Research Post
 | 
January 09, 2026

When milk quality pays: Evidence from an incentive experiment in Uganda

By Bjorn Van Campenhout, Sarah Kariuki, Richard Ariong, Jordan Chamberlin, Benon Byarugaba, and Dennis Atuha

Making milk quality visible improves standards, but real gains require price incentives and competition on quality downstream.

Signaling, screening, or sunk costs? Experimental evidence on how prices affect agricultural technology adoption in East Africa
Research Post
 | 
November 20, 2025

Signaling, screening, or sunk costs? Experimental evidence on how prices affect agricultural technology adoption in East Africa

By Bjorn Van Campenhout, Gashaw Abate, Liesbeth Colen, and Berber Kramer

An avenue to improved productivity.

Enhancing milk quality in Uganda: Challenges and innovations in the dairy value chain
Research Post
 | 
September 09, 2024

Enhancing milk quality in Uganda: Challenges and innovations in the dairy value chain

By Richard Ariong, Bjorn Van Campenhout, Sarah W. Kariuki, and Jordan Chamberlin

Improving market incentives.

View all Blogs

Events

32nd International Conference of Agricultural Economists
IFPRI at External Event

 | 

August 2 to 7, 2024

32nd International Conference of Agricultural Economists

The triennial International Conference of Agricultural Economists (ICAE-2024), centred on the theme “Transformation Towards Sustainable Agri-Food Systems” is scheduled from August 2-7, 2024, in New Delhi, India. The conference offers a distinctive platform, providing a golden opportunity for the agricultural academic institutions and researchers to convene in person, exchange knowledge, and actively contribute to the […]

31st International Conference of Agricultural Economists (ICAE)
IFPRI at External Event

 | 

August 17 to 31, 2021

31st International Conference of Agricultural Economists (ICAE)

Virtual Event: AUG 17, 2021 – 08:00 AM to AUG 31, 2021 08:00 PM EDT. IFPRI is participating in the 31st Conference of Agriculture Economists organized by the International Association of Agricultural Economists (IAAE). 

American Economic Association Allied Social Science Associations (ASSA) 2021 Annual Meeting
IFPRI at External Event

 | 

January 3 to 5, 2021

American Economic Association Allied Social Science Associations (ASSA) 2021 Annual Meeting

IFPRI is participating in the American Economic Association (AEA) Allied Social Science Associations (ASSA) 2021 Annual Meeting on January 3-5, 2021.  ASSA provides opportunities to share, collaborate, and learn about the latest research emerging in the field. Name Title Date Time Bjorn Van Campenhout INVITED POSTER SESSION Community Advocacy Forums and Public Service Delivery – Impact, and the Role of […]

View all Events