Photo Phu Nguyen-Van

PHU NGUYEN-VAN

DIRECTEUR(TRICE) DE RECHERCHE

Research interests

  • arrow_right Economie de l'environnement, de l'énergie et des ressources naturelles
  • arrow_right Economie de l'agriculture
  • arrow_right Economie du développement

Research group

    Transitions, Environnement, Énergie, Institutions, Territoires

HAL open science

Contact

2025-6

Farmers' preferences toward organic certification scheme: Evidence from a discrete choice experiment in Northern Vietnam

Kene Boun My, Quang-Huy Nguyen, Phu Nguyen-Van, Thi Kim Cuong Pham, Anne Stenger, Tuyen Tiet, Nguyen To-The

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Abstract
This study uses a quantitative approach based on a discrete choice experiment with 586 farmers in Northern Vietnam to measure how representative market and non-market factors could influence their preferences for participating in organic certification schemes. Our results suggest that a sales contract with either flexible or guaranteed prices is a significant incentive to explain their willingness to pay higher production costs to be involved in organic certification schemes. Furthermore, providing farmers with training and technical support is also essential to motivate farmers toward organic agriculture. Finally, neighborhood cooperatives and formal leaders' participation in organic certification could encourage farmers to convert to organic agriculture.
Mot(s) clé(s)
Discrete choice experiment; Organic certification; Farmers' preferences; Leadership; Role of network
2024-1

Synergy in environmental compliance, innovation and export on SMEs' growth

Phu Nguyen-Van, Tuyen Tiet, Quoc Tran-Nam

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Abstract
Although numerous studies examine the impacts of environmental compliance and innovation on a firm's economic performance, the role of export activities in this nexus has remained unanswered. In this study, we revisit the Porter hypothesis by investigating synergy strategies of dierent environmental and economic practices (i.e., environmental compliance, product innovation, process innovation and having export activities) on total factor productivity (TFP) of Vietnamese manufacturing SMEs. Our results suggest that while encouraging either product or process innovation is also essential in the environment-promoting policy, joint implementation of these two practices should be carefully considered by managers. Moreover, entering export markets positively impacts rms' productivity; complying with the domestic/local environmental standards could signicantly increase the chances for SMEs to enter the export markets
Mot(s) clé(s)
Environmental compliance; Export; Product innovation; Process innovation; Productivity; SMEs
2023-29

Capital diversion in Vietnamese state-owned enterprises

Ngoc Anh Nguyen, Ngoc Minh Nguyen, Phu Nguyen-Van

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Abstract
We consider the capital productivity of a panel data set of 10,200 Vietnam state-owned enterprises over the period 2010-2018, using a stochastic frontier production modelling. We discover there exists an overutilization of the physical capital and more importantly, diversion of the capital stock. This diversion may be due to a waste of capital stocks or to a special form of bribery we call "hidden overhead". The very high diversion rate, 69% on average, calls for a profound reform of the sector.
Mot(s) clé(s)
Productivity; stochastic production frontier; hidden overhead
2023-27

Stated preferences outperform elicited preferences for predicting reported compliance with Covid-19 prophylactic measures

Thierry Blayac, Dimitri Dubois, Sebastien Duchene, Phu Nguyen-Van, Bruno Ventelou, Marc Willinger

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Abstract
This paper studies the behavioral and socio-demographic determinants of reported compliance with prophylactic measures against COVID-19: barrier gestures, lockdown restrictions and mask wearing. The study contrasts two types of measures for behavioral determinants: experimentally elicited preferences (risk tolerance, time preferences, social value orientation and cooperativeness) and stated preferences (risk tolerance, time preferences, and the GSS trust question). Data were collected from a representative sample of the metropolitan French adult population (N=1154) surveyed during the first lockdown in May 2020, and the experimental tasks were carried out on-line. The in-sample and out-of-sample predictive power of several regression models - which vary in the set of variables that they include - are studied and compared. Overall, we find that stated preferences are better predictors of compliance with these prophylactic measures than preferences elicited through incentivized experiments: self-reported level of risk, patience and trust are predicting compliance, while elicited measures of risk-aversion, patience, cooperation and prosociality did not.
Mot(s) clé(s)
COVID-19, individual preferences, social preferences, elicited preferences, stated preferences
2022-13

Composite effects of human, natural and social capitals on sustainable food-crop farming in Sub-Saharan Africa

Chinh Hoang-Duc, Tuan Nguyen-Anh, Phu Nguyen-Van, Tuyen Tiet, Nguyen To-The

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Abstract
This study analyzes the spontaneous impact of human, social and natural capital on food crop technical efficiency (TE) in Sub-Saharan Africa (SSA). Our study contributes to the literature by adopting the meta-analysis method to investigate the relationship between TE and the three groups of capitals to better shed light on the TE in SSA regions. Our results highlight that social capital is the most critical factor among the three groups of capitals in promoting farming productivity. In particular, agriculture efficiency benefits from increasing people’s trust in institutions and the frequency of extension visits. Natural capital like temperature and elevation is essential in determining the farming TE in SSA regions. Outstandingly, our results also indicate that calorie intake, a proxy of labor quality, should be improved to achieve better productivity.
Mot(s) clé(s)
Farming technical efficiency; Human capital; Meta-analysis; Natural capital; Social capital; Sub-Saharan Africa
2022-5

Nudging for lockdown: behavioural insights from an online experiment

Thierry Blayac, Dimitri Dubois, Sebastien Duchene, Phu Nguyen-Van, Ismael Rafai, Bruno Ventelou, Marc Willinger

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Abstract
We test the effectiveness of a social comparison nudge to enhance lockdown compliance during the Covid-19 pandemic, using a French representative sample (N=1154). Respondents were randomly assigned to a favourable/unfavourable informational feedback (daily road traffic mobility patterns, in Normandy - a region of France) on peer lockdown compliance. Our dependent variable was the intention to comply with a possible future lockdown. We controlled for risk, time, and social preferences and tested the effectiveness of the nudge. We found no evidence of the effectiveness of the social comparison nudge among the whole French population, but the nudge was effective when its recipient and the reference population shared the same geographical location (Normandy). Exploratory results on this subsample (N=52) suggest that this effectiveness could be driven by non-cooperative individuals.
Mot(s) clé(s)
COVID-19; Lockdown compliance; Social Comparison; Nudge; Risk preferences; Time preferences; Social preferences
2021-32

Social incentive factors in interventions promoting sustainable behaviors: A meta-analysis

Phu Nguyen-Van, Anne Stenger, Tuyen Tiet

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Abstract
Based on a meta-analysis, this paper highlights the strength and relevance of several social incentive factors concerning pro-environmental behaviors, including social influence, network factors (like network size, network connection and leadership), trust in others, and trust in institutions. Firstly, our results suggest that social influence is necessary for the emergence of pro-environmental behaviors. More specifically, an internal social influence (i.e., motivating people to change their perceptions and attitudes) is essential to promote pro-environmental behaviors. Secondly, network connection encourages pro-environmental behaviors, meaning that the effectiveness of a conservation policy can be improved if connections among individuals are increased. Finally, trust in institutions can dictate individual behaviors to shape policy design and generate desired policy outcomes.
Mot(s) clé(s)
Meta-analysis; Network; Pro-environmental behavior; Social influence; Social incentive; Trust
2021-33

Designing acceptable anti-COVID-19 policies by taking into account individuals’ preferences: evidence from a Discrete Choice Experiment

Thierry Blayac, Dimitri Dubois, Sebastien Duchene, Phu Nguyen-Van, Bruno Ventelou, Marc Willinger

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Abstract
In the need to assess anti-COVID-19 policies in terms of public acceptability, we report the key results of a Discrete Choice Experiment based on a representative sample of the French population. Preference-ranking analysis is performed for the whole population and by subgroups. Results show that wearing masks, transport limitations, and digital-tracking are well accepted. However, restaurant closures and excessive leisure travel restrictions are not. The acceptability depends on personal characteristics: political orientation, health vulnerability, or age. The young population differs from others, in terms of policies preferences and in their claim for monetary compensation, suggesting a tailored policy for them.
Mot(s) clé(s)
Covid-19, policy design, discrete choice experiment, individual preferences, acceptability
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