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Author: search.filters.author.Pham Do KH

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    Can fishery subsidy improve fishermen’s income?——evidence from China’s coastal areas
    (Frontiers Media S.A., 2025-07-09) Li Y; Pham Do KH; Shakur S; Sun X; Paramo J
    Numerous studies have demonstrated that fishery subsidies play a role in income redistribution, potentially contributing to economic inequality. Additionally, since fishermen are highly dependent on the marine environment, there may be a connection between marine pollution and their income levels. This study explores the effects of fishery subsidies and marine environmental pollution on fishermen’s income and income inequality using panel data from 11 coastal provinces and municipalities in China from 2006 to 2020. Applying panel fixed effect model and quantile regression models, the results show that fishery subsidies significantly increase income, but disproportionately benefit higher-income fishermen, thereby exacerbating income inequality. Moreover, the relationship between marine pollution and income is non-linear: moderate pollution is associated with income gains, while severe pollution reduces income. These findings suggest that subsidy policies should be better targeted, and stricter marine environmental regulation is necessary to protect vulnerable fishing communities
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    Food risk in consumers' eye and their consumption responses: evidence from Hanoi survey
    (Emerald Publishing Limited, 2021-06-08) Ha TM; Shakur S; Pham Do KH
    Purpose This paper analyses Hanoi consumers' evaluation of food risk and response to the perceived risk. Design/methodology/approach The authors employed the mixed method approach that integrates segmentation analysis on the survey data and information from group discussions. Findings Based on consumers' risk rating of six food groups and level of food safety worry, the authors identified four distinct consumer segments: low, moderate, high and very-high-risk perception. The authors found the existence of widespread food safety concerns among Hanoi consumers. Living in an urban region was associated with a higher level of food risk perception. Moderate, high and very-high-risk perception segments exhibited a very low level of institutional trust and subjective control over hazards. Response to the perceived risk differed across segments. “Very high-risk perception” was associated with the most risk-averse behaviour, putting more effort into seeking food safety information and engaging more in supermarket purchase. Consumers with a low and moderate perceived food risk participate more in self-supply of food to reduce their food safety concern. Practical implications The paper provides empirical evidence on consumers' evaluation of food risk and their risk-reducing strategies to support the risk communication in Vietnam. Social implications Enhancing institutional trust and risk communication including hazard education can improve consumer confidence in food. Originality/value This is the first segmentation study on consumer food risk perception in Vietnam.
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    CAPACITY CHOICE OF DAMS UNDER RIVALRY USE AND EXTERNALITIES
    (2014-10-30) Pham Do KH; Houba H; Zhu X
    This paper studies the relation between optimal dam capacity and water management under rivalry uses and externalities. We extend the hydropower generation model, based on Haddad (2011), by including the competing use of water resource, non-linear building cost of dam capacity and externalities in a welfare optimization model. We obtain the optimal dam capacity for multi-functional dams such as providing infrastructure for industrial and households water use, conjunctive use of hydropower generation and irrigation; storing water in the wet season for use in the dry season, and mitigating áooding damages. The optimal solution shows that optimal dam capacity is characterized by the marginal benefits of hydropower generation, the marginal costs of flooding damages, and the constraining factors. Moreover, the optimal water management can be achieved by using derived seasonal prices in a decentralized manner.
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    Rural-urban differences in willingness to pay for organic vegetables: Evidence from Vietnam
    (Elsevier Ltd, 1/10/2019) Ha TM; Shakur S; Pham Do KH
    Concerns about food safety together with rising disposable income means consumers in developing countries are willing to pay more for safe and high-quality food such as organic vegetables. At the same time, socioeconomic profiles differ in rural versus urban areas leading to differing intakes. This paper investigates regional differences in the determinants of willingness to pay (WTP) for organic vegetables in Vietnam. A contingent valuation survey was used to collect information on consumer preferences of organic vegetables in two regions of Hanoi. Using interval regression model, we found that consumer perception about organic vegetables, trust in labels, and disposable family income increased WTP for organic vegetables in both urban and rural regions. Risk perception of conventional vegetables was high in both regions. However, higher WTP prevailed only in the rural region. Besides, growing vegetables at home affected the WTP only in the rural region while education played a role in the WTP in the urban region. Since rural and urban consumers have different preferences toward organic food, they should not be treated as a homogenous group in formulating organic food policy. This paper also shows that very high price of organic vegetables and lack of trust in organic labels are key barriers to organic purchase. Thus, creating more trust and reducing the price of organic vegetables through lowering certification cost might be a good strategy to expand the organic vegetable market in Vietnam.