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Valuation of Ecosystem Services and Social Choice: The Impact of Deliberation in the context of two different Aggregation Rules

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Abstract

This paper describes an empiric study of aggregation and deliberation used during citizens' workshops for the preference elicitation of 20 different ecosystem services (ESs) delivered by the Palavas coastal lagoons located on the shore of the Mediterranean Sea close to Montpellier (S. France). The impact of deliberation for the preference elicitation of 20 different ecosystem services (ESs) was studied by gathering and aggregating individual preferences before deliberation that were compared to the collective aggregation after deliberation. The same aggregation rules were used before and after deliberation and we compared two different aggregation methods, i.e. Rapid Ecosystem Services Participatory Appraisal (RESPA) and Majority Judgement (MJ). RESPA had been specifically tested for ESs, while MJ evaluates the merit of each item, an ES in our case, in a predefined ordinal scale of judgment. The impact of deliberation was strongest for the RESPA method. This new information acquired from application of social choice theory is particularly useful for ecological economics studying ES, and more practically for the development of deliberative approaches for public policies.

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  • Mariam Maki Sy & Charles C. Figuières & Helene Rey-Valette & Richard B Howarth, 2021. "Valuation of Ecosystem Services and Social Choice: The Impact of Deliberation in the context of two different Aggregation Rules," AMSE Working Papers 2107, Aix-Marseille School of Economics, France.
    • Handle: RePEc:aim:wpaimx:2107
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    1. Hélène Rey-Valette & Synthia Mathe & Jean-Michel Salles, 2017. "An assessment method of ecosystem services based on stakeholders perceptions: the Rapid Ecosystem Services Participatory Appraisal (RESPA)," Post-Print hal-01579324, HAL.
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    More about this item

    Keywords

    ecosystem services; preference elicitation; non-monetary methods; deliberation; social choice theory; coastal lagoons;
    All these keywords.

    JEL classification:

    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
    • Q57 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Ecological Economics

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