Valentin Guye
@valentinguye.bsky.social
I do research on sustainable use & trade of land resources.
INRAE researcher at the Center for Environmental Economics of Montpellier, France.
Also in trase.earth
INRAE researcher at the Center for Environmental Economics of Montpellier, France.
Also in trase.earth
🔔 New study: palm oil prices & unregulated deforestation 🔔
doi.org/10.1002/ajae...
🪚🔥🌴
Tropical forest loss for oil palm has slowed in Indonesia. Yet, because conservation schemes barely address smallholder and illegal industrial expansion, rising market forces may revive deforestation.
doi.org/10.1002/ajae...
🪚🔥🌴
Tropical forest loss for oil palm has slowed in Indonesia. Yet, because conservation schemes barely address smallholder and illegal industrial expansion, rising market forces may revive deforestation.
Price incentives and unregulated deforestation: Evidence from Indonesian palm oil mills
Global demand shifts and supply chain interventions have the potential to reduce palm oil's environmental footprint, especially in otherwise unregulated plantations. This ultimately depends on defore...
doi.org
January 21, 2026 at 4:13 PM
🔔 New study: palm oil prices & unregulated deforestation 🔔
doi.org/10.1002/ajae...
🪚🔥🌴
Tropical forest loss for oil palm has slowed in Indonesia. Yet, because conservation schemes barely address smallholder and illegal industrial expansion, rising market forces may revive deforestation.
doi.org/10.1002/ajae...
🪚🔥🌴
Tropical forest loss for oil palm has slowed in Indonesia. Yet, because conservation schemes barely address smallholder and illegal industrial expansion, rising market forces may revive deforestation.
– Reduced-form paper on indirect land use change and biofuels –
Biofuels can cut fossil use—but if feedstock demand drives tropical deforestation, climate gains vanish.
In this new paper, I test the theoretical mechanisms behind this.
🔗 link.springer.com/article/10.1...
Biofuels can cut fossil use—but if feedstock demand drives tropical deforestation, climate gains vanish.
In this new paper, I test the theoretical mechanisms behind this.
🔗 link.springer.com/article/10.1...
Indirect Land use Change Mechanisms: Tests from Biofuel Mandates and Pantropical Agriculture - Environmental and Resource Economics
Agricultural supply and demand shocks can indirectly cause environmental damages as they propagate across space, time and commodity markets according to mechanisms that have been extensively theorized...
link.springer.com
September 3, 2025 at 6:03 AM
– Reduced-form paper on indirect land use change and biofuels –
Biofuels can cut fossil use—but if feedstock demand drives tropical deforestation, climate gains vanish.
In this new paper, I test the theoretical mechanisms behind this.
🔗 link.springer.com/article/10.1...
Biofuels can cut fossil use—but if feedstock demand drives tropical deforestation, climate gains vanish.
In this new paper, I test the theoretical mechanisms behind this.
🔗 link.springer.com/article/10.1...
Reposted by Valentin Guye
Depuis quelques jours, la Méditerranée est en surchauffe, avec une canicule marine et des écarts de +5°C. L'équivalent d'incendies sous-marin, avec une faune qui "faune et flore qui meurent comme si elles étaient brûlées" : bonpote.com/canicules-ma...
June 26, 2025 at 6:02 AM
Depuis quelques jours, la Méditerranée est en surchauffe, avec une canicule marine et des écarts de +5°C. L'équivalent d'incendies sous-marin, avec une faune qui "faune et flore qui meurent comme si elles étaient brûlées" : bonpote.com/canicules-ma...
Using Trase's supply chain model for Côte d'Ivoire cocoa, I found that #traceability differs across departments of origin, trading companies and countries of destination, and I reflected on the implications at each level regarding the EU deforestation regulation.
bit.ly/4cy8zKN
bit.ly/4cy8zKN
Smallholder cocoa farmers need support as EUDR compliance nears - Insights - Trase
Trase research shows huge variations in the traceability of cocoa from Côte d’Ivoire and the likelihood of whether supplies will comply with the EU deforestation regulation. Support for smallholder fa...
bit.ly
November 8, 2024 at 10:02 AM
Using Trase's supply chain model for Côte d'Ivoire cocoa, I found that #traceability differs across departments of origin, trading companies and countries of destination, and I reflected on the implications at each level regarding the EU deforestation regulation.
bit.ly/4cy8zKN
bit.ly/4cy8zKN
Last week, Trase released modelled data on the subnational Ivorian cocoa supply chain and embedded deforestation, from department to importing country, by trader, annually (2019-22). All useful links here: trase.earth/insights/cot... + to new open data on cooperatives: doi.org/10.14428/DVN...
Côte d'Ivoire cocoa exports and deforestation - Insights - Trase
Trase maps the international trade in cocoa from Côte d’Ivoire revealing which trading companies and consumer markets are most exposed to deforestation.
trase.earth
May 13, 2024 at 12:39 PM
Last week, Trase released modelled data on the subnational Ivorian cocoa supply chain and embedded deforestation, from department to importing country, by trader, annually (2019-22). All useful links here: trase.earth/insights/cot... + to new open data on cooperatives: doi.org/10.14428/DVN...
🍫As part of the research we - the Land Systems for Sustainability Lab - do in the Trase partnership, I collect supply chain disclosures made by cocoa traders. In Ghana, we find that these disclosures are of poor quality, raising doubts about sustainable sourcing claims.
Cocoa traders fall short on supplier disclosure in Ghana
Companies exporting cocoa from Ghana are failing to publicly demonstrate that their supplies are not grown on deforested land, according to research by Trase, raising questions over their sustainabili...
insights.trase.earth
December 13, 2023 at 2:18 PM
🍫As part of the research we - the Land Systems for Sustainability Lab - do in the Trase partnership, I collect supply chain disclosures made by cocoa traders. In Ghana, we find that these disclosures are of poor quality, raising doubts about sustainable sourcing claims.