Pricing Organic Nitrogen Under The Weak Disposability Assumption: An Application to the French Pig Sector

The nonparametric approach Data Envelopment Analysis is used in order to measure individual technical inefficiency. Different models are evaluated using a 1991 FADN data set of French pig farms. Organic nitrogen is considered as a byproduct of animal breeding. Used as plant nutrient, organic manure becomes an input in crop production which is pollutant when excessive amounts enter surface and groundwater. In the latter case, the usual hypothesis of strong disposability of organic nitrogen is refuted because the elimination of pollution is costly. In this paper, we introduce a hypothesis of weak disposability of organic nitrogen and compare the technical efficiency measures obtained with and without this assumption. Then, using the duality between the restricted cost function and the input-output distance function and following Färe and Primont (1995), we derive a shadow price of organic nitrogen which can be compared to the unit cost of different existing manure treatments.     

Is there a pilot in the chain? Identifying the key drivers of change in the fresh pineapple sector

High-value export-oriented agriculture is today considered as a means of integrating smallholders into the world economy. This paper examines the geographic and organisational changes that have taken place in the fresh pineapple sector over the past 50 years. We begin with a historical analysis of the changes in leadership among producer countries, namely the dethroning of Côte d’Ivoire by Costa Rica. We show that this geographical shift has been accompanied by massive organisational changes: the pineapple sector is increasingly driven by large downstream actors who derive their power from the ability to impose their definition of quality to the whole chain, and from economies of scale and scope. Although varietal innovation plays a key role throughout the period, commercial and logistical innovation are of increasing strategic importance. However, because of the constraints imposed by the concerned supply chains, small farmers risk being excluded or marginalized.     

Visitor monitoring along roads and hiking trails: How to determine usage levels in tourist sites

Best-practice visitor-monitoring techniques are crucial for the assessment of tourism-related impacts in natural areas of high conservation value. In such studies, ecosystem variables are typically compared between high and low usage tourist sites. We assessed visitor use at 80 sites in the Flinders Ranges gorges and compared 11 visitor variables for their potential to differentiate usage levels between sites either exposed to vehicle or hiker traffic. We show that the efficiency with which a visitor variable represents usage levels depends on the access mode to gorges, with the number of passing visitors best suited for monitoring of usage levels in gorges permitting hiker access only, and variables describing camping usage best suited for gorges permitting vehicle access.Further, the distinct advantages and disadvantages of four visitor-monitoring techniques were examined; namely, the direct monitoring of visitor use by staff observers, the assessment of proxy variables from which past and present use can be inferred, GPS tracking of visitors and the survey of visitors by an interview-based questionnaire. We recommend GPS tracking because of the reliability and detail of data and the many sites per day that can be sampled. Due to a strong, positive correlation, the campground size and the number of fireplaces may be recorded in proxy of the camper numbers to increase time-efficiency and robustness of measures against short-term fluctuations in usage. Survey data gathered in relation to specific site-use were tempered by the memory of visitors and their ability to describe or reference the visited sites on a map. Visitor surveys were therefore useful only as a supplementary method for differentiating usage levels on a coarser spatial scale.     

性别失衡与人口流动视角下的男男性行为:来自中国城市地区的证据

利用"城市地区流动大龄男性生殖健康和家庭生活调查"数据,通过与同年龄段已婚男性的对比,探究了性别失衡背景下流动大龄未婚男性的男男性行为。同性性行为发生率受到相关态度、婚姻状况等的显著影响。性别失衡所带来的"婚姻挤压"迫使流动大龄未婚男性"被动失婚",缺乏正常稳定的性伴侣,从而导致男男性行为发生率有增加的可能性;流动大龄未婚男性的男男性行为具有高风险特征,而对于艾滋病、性病知识的缺乏是高风险性行为发生的重要影响因素。     

Why Do We Read On‐Pack Nutrition Information so Differently? A Typology of Reading Heuristics Based on Food Consumption Goals

While prior research has extensively studied nutrition labeling use and consumer errors of judgment in the nutrition evaluation process, less attention has been paid to the consumer motivations that simplify the reading of on‐pack nutrition information. To address this gap, this study examines how food consumption goals affect consumer reading of this information. On the basis of a qualitative study, eight food consumption goals have been identified and classified into four types of motivations which impact reading behaviors: “Food Optimization,” “Food Regulation,” “Food Gratification,” and “Food as Mere Necessity.” From this typology, we derive eight on‐pack nutrition information reading heuristics as well as specific inference biases resulting from these simplifying reading strategies. This research also provides guidelines for policymakers so that nutritional messages given to consumers will be more targeted in order to promote better reading of on‐pack nutrition information at the point of sales.     

Healthy Food Stores,Greenlining and Food Gentrification: Contesting New Forms of Privilege,Displacement and Locally Unwanted Land Uses in Racially Mixed Neighborhoods

Local activists engaged in contemporary environmental justice struggles not only fight against traditional forms of hazardous locally unwanted land uses (LULUs), they also organize to make their neighborhoods livable and green. However, urban environmental justice activism is at a crossroads: as marginalized neighborhoods become revitalized, outside investors start to value them again and they themselves invest in green amenities. Yet vulnerable residents are now raising concerns about the risk of displacement from their neighborhoods in consequence of environmental gentrification processes. Their fear is linked to environmental amenities such as new parks or remodeled waterfronts, as well as (most recently) healthy food stores. Using the case of a conflict around a new Whole Foods supermarket in Boston, MA, I examine how food venues and stores labeled as healthy and natural can create socio‐spatial inequality together with privilege, exclusion and displacement in racially diverse neighborhoods. I analyze how high‐end supermarket chains target inner‐city neighborhoods for their growth and profit potential, and demonstrate that their arrival contributes to what I call ‘supermarket greenlining'. This greenlining illustrates the process of food gentrification, and the manipulation of health and sustainability discourses about food by healthy and natural food investors and their supporters. The opening of high‐end supermarkets thus converts such stores into new LULUs for historically marginalized groups.     

Minimum wage,on-the-job search and employment: On the sectoral and aggregate equilibrium effect of the mandatory minimum wage

We study the impact of a minimum wage in a segmented labor market in which workers are at different stages of their careers. At the end of a learning-by-doing period, workers paid the minimum wage quit “bad jobs” for better-paying “good jobs”, following an on-the-job search process with endogenous search intensity. A rise in the minimum wage reduces “bad jobs” creation and prompts workers to keep their “bad jobs” by reducing on-the-job search intensity. The ambiguous impact on unqualified employment replicates and explains the findings of several empirical studies. However, a minimum wage rise reduces overall employment and output.     

“Friendly” Complaining Behaviors: Toward a Relational Approach

The relational approach is often presented as a strategy to retain customers, but it may also be an appropriate approach to encourage customers to complain, as a review of literature shows. Using information contained in complaints and giving the right answers (distributive, procedural and interactional) to such complaints is essential. Relational marketing may also be used to induce customers (but not all of them) to complain about the attributes of certain products/services. This article focuses on these issues and should stimulate further research in this new field.