nep-agr New Economics Papers
on Agricultural Economics
Issue of 2019‒01‒21
twenty-one papers chosen by

  1. Unfair trading practices in the dairy farm sector: Evidence from selected EU regions By Federica Di Marcantonio; Pavel Ciaian; Vicente Castellanos
  2. IFAD RESEARCH SERIES 32 - Developing country-wide farming system typologies: an analysis of Ethiopian smallholders’ income and food security By Boere, Esther; Mosnier, Aline; Bocquého, Géraldine; Garbero, Alessandra; Krisztin, Tamás; Havlík, Petr; Elhaut, Thomas
  3. Price Linkage and Transmission in the Milk Market in Slovakia By Hupková, Daniela; Mihálová, Veronika; Dobošová, Ľudmila; Zaujecová, Martina
  4. PESETA III: Agro-economic analysis of climate change impacts in Europe By Ignacio Perez Dominguez; Thomas Fellmann
  5. Welfare effects of an in-kind transfer program: evidence from Mexico By Federico Tagliati
  6. Land Use Restrictions, Misallocation in Agriculture, and Aggregate Productivity in Vietnam By Le, Kien
  7. Competing Land Uses and Fossil Fuel, Optimal Energy Conversion Rates During the Transition Toward a Green Economy Under a Pollution Stock Constraint By Amigues, Jean-Pierre; Moreaux, Michel
  8. Territorial Fact and Trends in the EU Rural Areas within 2015-2030 By Carolina Perpina Castillo; Boyan Kavalov; Ricardo Ribeiro Barranco; Vasco Diogo; Chris Jacobs-Crisioni; Filipe Batista e Silva; Claudia Baranzelli; Carlo Lavalle
  9. A General Assessment of Climate Change - Loss of Agricultural Productivity in Indonesia By RESTU ANANDA, RIMA; Widodo, Tri
  10. On the role of probability weighting on WTP for crop insurance with and without yield skewness By Douadia Bougherara; Laurent Piet
  11. International Food Commodity Prices and Missing (Dis)Inflation in the Euro Area By Gert Peersman
  12. Corporate Social Responsibility and the role of Rural Women in Sustainable Agricultural Development in sub-Saharan Africa: Evidence from the Niger Delta in Nigeria By Joseph I. Uduji; Elda N. Okolo-Obasi; Simplice A. Asongu
  13. Willingness to Adopt Warm Season Grasses by Tennessee Beef Cattle Operators By Ren, Yongwang; Lambert, Dayton; Clark, Chris; Boyer, Chris; Griffith, Andrew; English, Burt,; Smith, Aaron; Menard, Robert; Walker, Forbes; Keyser, Patrick
  14. The Benefits of Country-specific Non-Tariff Measures in World Wine Trade By Santeramo, Fabio Gaetano; Lamonaca, Emilia; Nardone, Gianluca; Seccia, Antonio
  15. Long-run Impacts of Agricultural Shocks on Educational Attainment: Evidence from the Boll Weevil By Richard B. Baker; John Blanchette; Katherine Eriksson
  16. A Typology Analysis of Agricultural Empowerment Profiles in Rural Egypt with a Particular Focus on Women By Dina Najjar; Aymen Frija; Aman El Garhi
  17. Impact of private labels and information campaigns on organic and fair trade food demand By Douadia Bougherara; Carole Ropars-Collet; Jude Saint-Gilles
  18. International Competition and Rent Sharing in French Manufacturing By Lionel Nesta; Stefano Schiavo
  19. Can we nudge farmers into saving water? Evidence from a randomized experiment By Sylvain Chabé-Ferret; Philippe Le Coent; Arnaud Reynaud; Julie Subervie; Daniel Lepercq
  20. The participatory guarantee system in organic farming and food labels: Toward a reappropriation of intellectual commons By Sylvaine Lemeilleur; Gilles Allaire
  21. Nitrates and property values: evidence from a french market intervention By Henrik Andersson; Emmanuelle Lavaine

  1. By: Federica Di Marcantonio (European Commission - JRC); Pavel Ciaian (European Commission - JRC); Vicente Castellanos (Ipos)
    Abstract: This report examines the incidence of unfair trading practices (UTPs) in the dairy food supply chain. Drawing insights from data collected through a field survey among dairy farmers in five selected EU regions (France, Germany, Poland and Spain) we seek to understand the presence of UTPs across different stages of contract development. The survey data were collected in 2017 and in total it includes 1248 observations. We identify a total of 17 UTPs across all different phases of contract development. Results show that 98% of surveyed farmers have reported at least one UTP.
    Keywords: Unfair trading practices, food chain, dairy farms, Contracting, CAP, EU
    JEL: D86 Q18 Q13
    Date: 2018–09
  2. By: Boere, Esther; Mosnier, Aline; Bocquého, Géraldine; Garbero, Alessandra; Krisztin, Tamás; Havlík, Petr; Elhaut, Thomas
    Abstract: This paper aims to better understand the context in which smallholder farms operate. The study has developed a new methodology to establish country-wide farm typologies that combines household and macro-level data (household survey, agricultural census and land cover data) to analyze food security and poverty, to enable an analysis that is both farm-system specific and spatially explicit. Using this methodology to analyze the poverty and food security situation of Ethiopian smallholder farms, the study has developed farming-system- and location-specific poverty and food security indicators which can provide guidance for more targeted strategies to reduce rural poverty.
    Keywords: Agricultural and Food Policy, Farm Management, Food Security and Poverty
    Date: 2018–11–30
  3. By: Hupková, Daniela; Mihálová, Veronika; Dobošová, Ľudmila; Zaujecová, Martina
    Abstract: Milk as a major commodity derived from animal production is the input of the processing industry, from which a number of products form a substantial part of the population's diet. Milk and dairy products are part of a food chain terminated by consumers for which the price is a criterion of availability. The paper studies the agri- food supply chain of milk production. Paper examine development of the farm-gate, retail and consumer prices of milk and dairy products in the time horizon 2006-2016. Paper examines through a regression and correlation analysis the dependence between the prices of all three stages of the supply chain and determines whether the price-dependence of the production, retailer and consumer prices are statistically significant. If dependence will be confirmed, paper quantifies these dependencies more accurately.
    Keywords: Industrial Organization
    Date: 2018–12–21
  4. By: Ignacio Perez Dominguez (European Commission - JRC); Thomas Fellmann (European Commission - JRC)
    Abstract: This report presents the agro-economic analysis within the PESETA III project, focusing on the effects of climate change on crop yields and related impacts on EU agricultural production, trade, prices, consumption, income, and welfare. For this purpose the CAPRI modelling system was employed, using a combination of a Shared Socioeconomic Pathway (SSP2) and a Representative Concentration Pathway (RCP8.5). For the climate change related EU-wide biophysical yield shocks, input of the agricultural biophysical modelling of the PESETA III project was used, which provided crop yield changes under water-limited conditions based on high-resolution bias-corrected EURO-CORDEX regional climate models, taking also gridded soil data into account. As agricultural markets are globally connected via world commodity trade, it is important for the agro-economic analysis to also consider climate change related yield effects outside the EU. The analysis, therefore, was complemented with biophysical yield shocks in non-EU countries as provided by the AgCLIM50 project. To simulate and assess the response of key economic variables to the changes in EU and non-EU biophysical crop yields, one reference scenario (without yield shocks) and two specific climate change scenarios were constructed, one scenario with yield shocks but without enhanced CO2 fertilization and another scenario with yield shocks under the assumption of enhanced CO2 fertilization. The projection horizon for the scenarios is 2050.
    Keywords: agriculture, climate change
    Date: 2018–11
  5. By: Federico Tagliati (Banco de España)
    Abstract: This paper shows how a theory-consistent demand system can be used to quantify recipient welfare under in-kind and cash transfers. Since welfare under an in-kind subsidy depends on the extent to which the transfer is extra-marginal, I compute the shadow prices at which a recipient would be as well off as with the in-kind transfer. Shadow prices are then used to compute the distribution of the willingness to pay for in-kind benefits among beneficiaries. As an application of this approach, I study the welfare effects of a governmental program which randomly transferred either a food basket or cash to poor households in rural Mexico. Results suggest that on average a recipient values the in-kind transfer at 80 percent of its face value. Despite the welfare loss, the in-kind transfer is more cost-efficient than cash. This is due to the fact that the food basket was significantly more expensive at the retail level than at the procurement level, which implies that a cash transfer of the same cost to the government could only buy a fraction of the food basket in recipient’s local markets. Because the food basket is mainly formed of normal goods, I also find that the willingness to pay is larger among recipients at the top of the income distribution, suggesting a regressive effect of the in-kind transfer.
    Keywords: in-kind transfers, cash transfers, demand system, welfare
    JEL: D61 H23 H43 I38
    Date: 2018–12
  6. By: Le, Kien
    Abstract: We evaluate the effects of restricted land use rights on aggregate productivity using micro-level data within a quantitative model. In particular, we exploit the Rice Land Designation Policy in Vietnam, which forces farmers to produce rice on almost 45% of plots of land. The policy provides a natural setting for investigating the aggregate effects of land use misallocation. We quantify the impacts of this system by formulating a two-sector model featuring production and occupation choices. We also use digitized versions of Vietnam’s Local Land Use Atlas and Global Agro-Ecological Zones database to construct a micro-spatial dataset that shapes important features of the model and allows us to compare the restricted against a counterfactual efficient allocation. The main findings suggest that eliminating all land use restrictions leads to 10.6% gain in agricultural total factor productivity and 4.36% increase in real GDP per capita. While misallocation in agriculture has been studied extensively, our research highlights a novel source of misallocation that is prevalent in other countries such as China, Myanmar, Uzbekistan, among others.
    Keywords: Agriculture, misallocation, land use restrictions, aggregate productivity, Vietnam
    JEL: O11 O13 O4
    Date: 2018–12–20
  7. By: Amigues, Jean-Pierre; Moreaux, Michel
    Abstract: We study the transition to a carbon-free economy in a model with a polluting non-renewable resource and a clean renewable resource. Transforming primary energy into ready-to-use energy services is costly and more efficient energy transformation rates are more costly to achieve. Renewable energy competes with food production for land and the food productivity of land can be improved at some cost. To avoid catastrophic climate damages, the pollution stock is mandated to stay below a given cap. When the economy is not constrained by the cap, the efficiency of energy transformation increases steadily until the transition toward the ultimate green economy; when renewable energy is exploited, its land use rises at the expense of food production; food productivity increases together with the land rent but food production drops; the food and energy prices increase and renewables substitute for non-renewable energy. During the constrained phase, the economy follows a constant path of prices, quantities, efficiency rates, food productivity and land rent, a phenomenon we call the ’ceiling efficiency paradox'.
    JEL: Q00 Q32 Q43 Q54
    Date: 2018–12
  8. By: Carolina Perpina Castillo (European Commission – JRC); Boyan Kavalov (European Commission – JRC); Ricardo Ribeiro Barranco (European Commission – JRC); Vasco Diogo (Wageningen Economic Research); Chris Jacobs-Crisioni (European Commission – JRC); Filipe Batista e Silva (European Commission – JRC); Claudia Baranzelli (European Commission – JRC); Carlo Lavalle (European Commission – JRC)
    Abstract: The current analysis aims to highlight selected key territorial facts and trends in the EU rural areas at pan-European, national (NUTS 0) and regional (NUTS 3) level within 2015-2030. These trends are related to the status and potential evolution of rural population, agricultural land and agricultural land abandonment, as well as to their macro-economic aggregation into agriculture-driven clusters. A snapshot of employment and gross value added in agriculture by 2015 is provided, too. The analysis is performed by applying the LUISA Territorial Modelling Platform of the European Commissions' Joint Research Centre and in particular - its latest Territorial Reference Scenario 2017.
    Keywords: Agricultural, rural, land, abandonment, population, employment, gross value added, primary sector, clusters, LUISA territorial modelling platform, Knowledge Centre for Territorial Policies
    Date: 2018–12
  9. By: RESTU ANANDA, RIMA; Widodo, Tri
    Abstract: The changes of frequency and complexity of extreme climate events and in the variability of weather patterns will have significant impacts for stability of agricultural system. Climate change and variability are phenomena of climate anomalies that are of great concern, especially due to the agricultural sector. In Indonesia, in 30 years there have been several extreme conditions which are marked by the frequency of increasingly high climate variability. This paper investigate the impact of climate change on change of value GDP, change of wealth, Government Household Demand, Private Household Demand and real wage in Indonesia by using the dynamic Computable General Equilibrium (CGE) model. This study used GTAP 9 with base year 2011. The GTAP database covers 140 regional units and 57 sectors that aggregated into eleven regions and eight sectors. There are three scenarios of climate change used in this paper that were the highest, medium and the lowest. The results shows that both GDP and wealth have a negative impact due to the scenarios. The greater of climate change is, the greater the decrease of values of GDP, Wealth, Market Price, Government Household Demand, Private Household Demand towards the scenarios of climate change in Indonesia are. The results indicate an urgent need to mainstream adaption strategies to lessen the negative impacts of any climate change-induced loss of agricultural productivity in Indonesia.
    Keywords: Climate change, agricultural productivity, impact assessment, Indonesia, GTAP
    JEL: O4 O44 Q5 Q54
    Date: 2019–01–07
  10. By: Douadia Bougherara (CEE-M - Centre d'Economie de l'Environnement - Montpellier - FRE2010 - INRA - Institut National de la Recherche Agronomique - UM - Université de Montpellier - CNRS - Centre National de la Recherche Scientifique - Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier); Laurent Piet (SMART - Structures et Marché Agricoles, Ressources et Territoires - INRA - Institut National de la Recherche Agronomique - AGROCAMPUS OUEST)
    Abstract: A growing number of studies in finance and economics seek to explain insurance choices using the assumptions advanced by behavioral economics. One recent example in agricultural economics is the use of cumulative prospect theory (CPT) to explain farmer choices regarding crop insurance coverage levels (Babcock, 2015). We build upon this framework by deriving willingness to pay (WTP) for insurance programs under alternative assumptions, thus extending the model to incorporate farmer decisions regarding whether or not to purchase insurance. Our contribution is twofold. First, we study the sensitivity of farmer WTP for crop insurance to the inclusion of CPT parameters. We find that loss aversion and probability distortion increase WTP for insurance while risk aversion decreases it. Probability distortion in losses plays a particularly important role. Second, we study the impact of yield distribution skewness on farmer WTP assuming CPT preferences. We find that WTP decreases when the distribution of yields moves from negatively- to positively-skewed and that the combined effect of probability weighting in losses and skewness has a large negative impact on farmer WTP for crop insurance.
    Keywords: Crop Insurance,Cumulative Prospect Theory,premium subsidy,skewness
    Date: 2018–12–07
  11. By: Gert Peersman (Ghent University)
    Abstract: This paper examines the causal effects of shifts in international food commodity prices on euro area inflation dynamics using a structural VAR model that is identified with an external instrument (i.e. a series of global harvest shocks). The results reveal that exogenous food commodity price shocks have a strong impact on consumer prices, explaining on average 25%-30% of inflation volatility. In addition, large autonomous swings in international food prices contributed significantly to the twin puzzle of missing disinflation and missing inflation in the era after the Great Recession. Specifically, without disrup- tions in global food markets, inflation in the euro area would have been 0.2%-0.8% lower in the period 2009-2012 and 0.5%-1.0% higher in 2014-2015. An analysis of the transmission mechanism shows that international food price shocks have an impact on food retail prices through the food production chain, but also trigger indirect effects via rising inflation expectations and a depreciation of the euro.
    Keywords: Food commodity prices, inflation, twin puzzle, euro area, SVAR-IV
    JEL: E31 E52 Q17
    Date: 2018–10
  12. By: Joseph I. Uduji (University of Nigeria, Nsukka, Nigeria); Elda N. Okolo-Obasi (University of Nigeria, Nsukka, Nigeria); Simplice A. Asongu (Yaoundé, Cameroon)
    Abstract: Low productivity among female farmers when compared with their male counterparts is considered an outcome of limited access to agricultural land and inputs. The objective of this investigation was to assess the impact of multinational oil companies’ (MOCs’) CSR on rural women access to modern agricultural inputs in the Niger Delta, Nigeria. A total of 700 rural female farmers were sampled across the region. Results from the use of a logit model indicated that CSR recorded significant success in agricultural development generally, but has undermined equality. This implies that if a woman’s agricultural productivity is continuously hindered by unequal access to agricultural resources (or opportunities) and widespread inequality will limit poverty reduction efforts in Nigeria. The results also showed that women depended on CSR of MOCs for policy dialogue and advocacy for women’s access to agricultural land and inputs. Supporting agricultural initiatives that focus on empowering women would boost food security in sub-Saharan Africa.
    Keywords: CSR; Gender equality; Agriculture
    JEL: J43 O40 O55 Q10
    Date: 2019–01
  13. By: Ren, Yongwang; Lambert, Dayton; Clark, Chris; Boyer, Chris; Griffith, Andrew; English, Burt,; Smith, Aaron; Menard, Robert; Walker, Forbes; Keyser, Patrick
    Keywords: Farm Management, Land Economics/Use
    Date: 2019
  14. By: Santeramo, Fabio Gaetano; Lamonaca, Emilia; Nardone, Gianluca; Seccia, Antonio
    Abstract: During the last decades, significant changes in trade regulations are modifying the global trade of wine. The number of non-tariff measures (NTMs) implemented in the wine sector is relevant: a large number of country-specific NTMs, set in the occasion of trade agreements, have been adopted. The impact of these policy instruments on trade is not always clear, nor quantified at global scale. We investigate the effects that country-specific NTMs are showing on global imports of wine. In particular, we estimate a gravity model to explain how and to what extent country-specific NTMs influence wine trade, and we disentangle these effects for different segments of the international market of wine. Our results suggest that country-specific NTMs tend to favour imports of wine. Differences emerge across market segments and types of regulations. In particular, the Technical Barriers to Trade favour (friction) bottled (bulk) wine; pre-shipment inspections enhance imports of bottled wine; the Sanitary and Phytosanitary Standards and the export-related measures are the most trade-enhancing NTMs, regardless of the market segment.
    Keywords: Global trade; NTM;Policy; SPS; TBT
    JEL: F13 Q17 Q18
    Date: 2018
  15. By: Richard B. Baker; John Blanchette; Katherine Eriksson
    Abstract: The boll weevil spread across the Southern United States from 1892 to 1922 having a devastating impact on cotton cultivation. The resulting shift away from this child labor–intensive crop lowered the opportunity cost of attending school, and thus the pest increased school enrollment and attendance. We investigate the insect’s long run affect on educational attainment using a sample of adults in 1940 linked back to themselves in childhood in the county in which they were likely educated. Both whites and blacks who were young (ages 4 to 9) when the boll weevil arrived saw increased educational attainment by 0.25 to 0.35 years. These findings are not driven by concurrent shocks and are not sensitive to linking method or sample selection. Our results demonstrate the potential for conflict between child labor in agriculture and educational attainment.
    JEL: N32 O13
    Date: 2018–12
  16. By: Dina Najjar (International Center for Agricultural Research in the Dry Areas); Aymen Frija; Aman El Garhi
    Abstract: The current study examines the extent of empowerment for different types of women in Egypt’s Old and New Lands (Noubariya and Kafr Shiekh). Empowerment in this study is multidimensional and is referring to access and management of capital, time and assets, with a particular focus on land. Research conducted in the past three decades in Latin America, India, and sub-Saharan Africa shows that land access empowers women in their ability to produce food, to participate in public life, as well as in household decision-making. However, relatively little is known about the relations between women, land and empowerment in the Middle East. Some 402 farmers (200 men and 202 women) were surveyed in both locations in Egypt, focusing on tasks within the farm, in addition to ownership and control over the main resources including land and livestock. A set of data including variables reflecting different empowerment dimensions of the surveyed farmers was collected in the study areas, and used for clustering homogeneous groups (men and women) with similar empowerment profiles. Characteristics of these men and women groups were then reported in order to provide better insights regarding empowerment gaps which might be used to develop targeted policy intervention strengthening certain empowerment aspects for these groups.
    Date: 2018–05–24
  17. By: Douadia Bougherara (CEE-M - Centre d'Economie de l'Environnement - Montpellier - FRE2010 - INRA - Institut National de la Recherche Agronomique - UM - Université de Montpellier - CNRS - Centre National de la Recherche Scientifique - Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier); Carole Ropars-Collet (AGROCAMPUS OUEST); Jude Saint-Gilles (SMART - Structures et Marché Agricoles, Ressources et Territoires - INRA - Institut National de la Recherche Agronomique - AGROCAMPUS OUEST)
    Abstract: We use Almost Ideal Demand Systems (AIDS) models estimated by the nonlinear seemingly unrelated regression (SUR) method on scanner data (i) to examine the demand for ecolabeled food products (organic and fair trade) as a function of the good having a private label (PL) or a national brand (NB) and (ii) to assess the impact of information campaigns promoting organic and fair trade products. We find that while demand is elastic for NB organic milk and NB fair trade coffee, it is inelastic for their PL counterpart. As for organic eggs, demand is always inelastic. Cross-price elasticities show substitutability between ecolabeled and conventional goods but only within the NB goods (milk and eggs) and within the PL goods (milk and coffee), but also complementarity between NB conventional and PL ecolabeled goods (milk and coffee). Finally, we find that while information campaigns increase the predicted expenditure shares of PL organic milk by 33%, of NB fair trade coffee by 50%, they decrease the predicted expenditure shares of PL conventional eggs but only by 3%. These effects are non-lasting.
    Keywords: fair trade,information campaign,organic
    Date: 2018–12–07
  18. By: Lionel Nesta (OFCE - OFCE - Sciences Po); Stefano Schiavo (Università di Trento)
    Keywords: threshold models,policy mix,Directed technical change,environmental policies
    Date: 2019–01–07
  19. By: Sylvain Chabé-Ferret (CERDI - Centre d'Études et de Recherches sur le Développement International - Clermont Auvergne - UCA - Université Clermont Auvergne - CNRS - Centre National de la Recherche Scientifique); Philippe Le Coent (CEE-M - Centre d'Economie de l'Environnement - Montpellier - FRE2010 - INRA - Institut National de la Recherche Agronomique - UM - Université de Montpellier - CNRS - Centre National de la Recherche Scientifique - Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier); Arnaud Reynaud (TSE - Toulouse School of Economics - Toulouse School of Economics); Julie Subervie (CEE-M - Centre d'Economie de l'Environnement - Montpellier - FRE2010 - INRA - Institut National de la Recherche Agronomique - UM - Université de Montpellier - CNRS - Centre National de la Recherche Scientifique - Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier); Daniel Lepercq (CACG - Compagnie d'aménagement des côteaux de Gascogne - Compagnie d'aménagement des côteaux de Gascogne - CACG)
    Abstract: Improving water efficiency is a growing challenge for the Common Agricultural Policy. In this article, we test whether social comparison nudges can promote water-saving behavior among farmers. We report on a pilot Randomized Controlled Trial, in which information on individual and group water consumption were sent every week to farmers equipped with smartmeters. We do not detect an effect of nudges on average water consumption. We however find that the nudge decreases water consumption at the top of the distribution while it increases consumption at the bottom. This study highlights the potential of nudges as an agricultural policy tool.
    Keywords: behavioral economics,government policy,irrigation water use,nudges
    Date: 2018–12–07
  20. By: Sylvaine Lemeilleur (UMR MOISA - Marchés, Organisations, Institutions et Stratégies d'Acteurs - CIRAD - Centre de Coopération Internationale en Recherche Agronomique pour le Développement - Montpellier SupAgro - Centre international d'études supérieures en sciences agronomiques - INRA Montpellier - Institut national de la recherche agronomique [Montpellier] - CIHEAM - Centre International des Hautes Études Agronomiques Méditerranéennes - Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier); Gilles Allaire (Observatoire des Programmes Communautaires de Développement Rural - Institut National de Recherche Agronomique)
    Abstract: We consider the content of organic farming and food labels to be an intellectual common-pool resource. However, access to this resource is under threat from a phenomenon of commodification: third party certification, operated by competitive and private bodies, is becoming the only legal way for the public to access these labels. This expensive guarantee system excludes a large part of the communities from which the resource originated. In this paper, we describe an alternative mechanism: the participatory guarantee system. Drawing on Ostrom's approach, we analyze the design principles that explain the effectiveness and sustainability of these systems and we argue that their development contributes to a reconquering of the commons.
    Abstract: Les auteurs considèrent le contenu des labels relevant de l'agriculture biologique comme une ressource commune intellectuelle. La certification tierce partie privée et payante s'est imposée comme seul outil légal pour contrôler ces dispositifs et accéder à l'utilisation des labels devenus publics. Cette certification coûteuse est à même d'exclure une partie des communautés à l'origine de la ressource et menace son renouvellement. Dans cet article, les auteurs décrivent un mécanisme alternatif, celui des systèmes participatifs de garantie. En s'appuyant sur l'approche des communs d'Ostrom, ils analysent les conditions d'efficacité et de durabilité de ces systèmes, dont le développement participe à un mouvement de reconquête des communs.
    Keywords: organic farming,commons,label,certification,participatory guarantee system,communs,agriculture biologique,système participatif de garantie
    Date: 2018
  21. By: Henrik Andersson (TSE - Toulouse School of Economics - Toulouse School of Economics); Emmanuelle Lavaine (CEE-M - Centre d'Economie de l'Environnement - Montpellier - FRE2010 - INRA - Institut National de la Recherche Agronomique - UM - Université de Montpellier - CNRS - Centre National de la Recherche Scientifique - Montpellier SupAgro - Institut national d’études supérieures agronomiques de Montpellier)
    Abstract: This paper examines the effect of properties being located in vulnerable zones in term of nitrates on the property prices using a change in the classification of vulnerable zones in France in 2012. Using an identification strategy based on a spatial difference- in-dfferences specification, we show that the revision of the classification significantly decreased not only property prices in zones that became classified as vulnerable after the revision, but also those of properties already classified as vulnerable. However, the effect was stronger for the former, 10% vs. 5%, and this differences may reect a difference in how zones are classified. The risks covered in the 2012 classification cover a broader range of risks, and hence the larger price effect may reflect this additional perceived risk exposure.
    Keywords: difference in difference,Hedonic Price Analysis,water pollution
    Date: 2018–12–07

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