某城市排污河水质状况分析评价

以城市排污河道为研究对象,测定了表层沉积物中的重金属总量、水质常规指标及DBP和DEHP,采用改进的主成分分析法和等标有机污染指数分析对排污河污染状况进行分析评价。运用改进的主成分分析法找出了主要污染源和主要污染物。结果表明:不同排污口的主要污染物不同,B化工厂CODCr及pH值为主要污染物;C泵站污染严重的为CODCr,pH值和TP;D排污口主要污染物为CODCr,NH3-N,Cr和pH值;E化工厂的主要污染物为CODCr,NH3-N和Cd。D排污口是第一主成分的主要污染源点,B化工厂无论是DBP等标污染指数还是DEHP等标污染指数均明显高于其他排污口,是A排污河PAEs污染的主要污染源。     

Identifying significant characteristics of organic milk consumers: a CART analysis of an artefactual field experiment

The organic dairy category is one of the fastest growing categories of organic foods in the US. Organic milk consumers generally cite perceived health benefits and lower risk of food contamination, as well as perceived superior quality and environmental sustainability of organic farming methods, as the major motivations for preference of organic over conventional milk. While the attributes of organic milk that are valued by consumers are fairly well-known, more ambiguity exists regarding the demographic characteristics of the typical organic milk consumer. This research makes use of experimental data from 148 adult participants and use a Classification and Regression Tree (CART) analysis, a nonparametric modelling approach, to identify how Willingness-to-Pay (WTP) for organic milk varies with the demographic profile of experiment participants. The study finds that perceived taste of organic milk, concern for the risk of consuming conventional milk, being a primary shopper, and the quantity of milk consumed are the major factors that separate experiment participants into groups with high and low WTP for organic milk.     

Consumers' Attitudes Toward Labelling of Ethical Products: The Case of Organic and Fair Trade Products

This article aims to investigate the factors that influence consumer attitudes to use labelling information in purchasing organic and Fair Trade products and to verify if labelling is a valid tool of direct shopping aid to consumers, with a view to derive inferences that may contribute to better strategic and tactical marketing decisions. A quantitative survey with a sample of 300 consumers living in south Italy was conducted to explore consumers' knowledge and attitudes toward labelling of organic and fair trade products. Data generated in this way were submitted to exploratory and segmentation analysis. The results indicate significant differences in consumer attitudes and behavior for ethical products and show the importance of new variables, other than demographics characteristics, that can influence the purchasing behavior and label information use.     

Consumers’ Intent: In the Organic Food Market

ABSTRACT

This paper examines the determinants that influence consumers' intention to purchase organic products. Ajzen's theory of planned behaviour (TPB) provides the conceptual framework of the research and the appropriateness of the theory is tested. A survey of 144 consumers was used to determine the beliefs which determine consumers’ intent to purchase organic food. Furthermore, attitudes, subjective norm, and perceived behavioral control were examined to determine whether they affect consumers’ intention to make organic products purchases. The findings offer considerable support for the robustness of the TPB in explaining intention in the sample. In addition, empirical evidence suggest that price, availability of organic products, product information and the subjective opinions of others are important determinants of consumers intent to buy organic products. The results are consistent with previous research.     

The Environmental Benefits of Organic Wine: Exploring Consumer Willingness-to-Pay Premiums?

Consumers and the producers have shown interest in organics, but there exist gaps in their common interest. Producers require premiums for their products based on the peculiarity of their production circumstances and the perceived benefits inherent in their products. Predicting consumer willingness to pay a premium for the environmental benefits of organics (WTPe) is a challenge and is of interest in this study. The contingent valuation method was used to gather information on WTPe from a sample that yielded 2,099 surveys. The econometric test ordered probit regression and other analyses were carried out. On average, respondents indicated WTP 23% premium. The proposed hypotheses were tested, and all were accepted except social demographic variables that presented a mixed outcome. The results have implications for consumer sensitization and enlightenment programs of the wine industry, wine market segmentation, and government’s climate change policy. This study is exploratory and has presented a snapshot scenario. Confirmatory and longitudinal studies are recommended to validate this study’s outcomes.     

Advertising the U.S. National Organic Standard: A Well-Intentioned Cue Lost in the Shuffle?

The 2002 implementation of the National Organic standard and development of the USDA organic seal gave food advertisers a new tool with which to communicate food characteristics to consumers. Based principally on farm and manufacturing practices, the standard offers consumers an expansion of their food choices. Parents of young children have been shown to have particular interest in organic food. Using parent-targeted magazine-based food ads, this paper explores how organic has been promoted, how its advertising strategy compares to that for conventional foods, and whether organic food has been appropriately differentiated from conventional foods such that the USDA organic seal carries a significant and unique meaning to both consumers and the food industry. The content analysis shows that the period following the implementation of the National Organic Program exhibits a general upward trend in usage of health-related cues but minimal increase in use of terms associated with the “organic” ideal. A direct comparison of organic and non-organic food ads shows that there has been little leakage of terminology related to “organic” into mainstream food advertising strategy. Most importantly, we find that “organic” is intermixed with health cues, contributing to the often-found consumer perception that “organic” means “healthier,” and suggesting that the goals of the NOP to offer consumers a clear definition and a way to reduce confusion have not been met in advertising strategy.     

Role of gastronomic,externality and feasibility attributes in consumer demand for organic and local foods: The case of honey and apples

Local food systems providing high‐value products are seen as a tool to sustain economic activity on family farms in rural areas. The objective of this study is to investigate the role of gastronomic, externality and feasibility characteristics in consumers' demand for local and for organic foods. An Internet questionnaire survey was conducted in 2010 among Danish consumers. 3211 respondents completed the questionnaire, which included questions about respondents' food‐related values and their specific perception of organic and local varieties of honey and apples. Variables related to consumers' food‐related values and product perception were analysed using principal component analysis, in order to identify overall dimensions (factors) in these variables. Although statements about gastronomic attributes (e.g. taste, appearance, quality) were quite strongly represented in three of these factors, externality and availability concerns also contributed significantly to the overall variation in the variables. Multinomial logit choice modelling was used for describing the relationship between these dimensions and respondents' stated choices regarding organic and local varieties of honey and apples. Results suggest that although both organic and local food supply chains are often associated with special attributes such as gastronomic characteristics and relatively beneficial externality attributes, these attributes are perceived differently for the two types of supply chains. Perceived gastronomic quality is the most important determinant for food choice, but externality and feasibility aspects are also important correlates.     

我国城镇消费者有机农产品消费行为分析

目前,国际市场对有机农产品需求不断提高,营养、安全与价格在我国消费者购买评价有机农产品时居于重要地位。基于对北京、武汉消费者的调查,本文统计评价了我国消费者对有机农产品的认知水平,并对有机农产品消费行为及其影响决策因素进行了分析,发现我国消费者对有机农产品的整体认知水平偏低,这是导致我国有机农产品购买水平不高的重要因素。     

The Stability and Instability of Organic Expenditures in Denmark,Great Britain,and Italy

This article concerns demand for organic foods in 3 European countries: Denmark, Great Britain, and Italy. Based on extensive sets of household panel data we categorize households into 4 groups according to their levels of organic consumption. Importance of sociodemographics is estimated by applying multinomial logit models. In all 3 countries a high organic consumption is mainly found among the more well-situated households in urban areas. Although the relative size of the user groups is fairly stable over time, we find variation in the organic consumption of individual households.     

Examining Organic Food Purchases and Preferences Within Jordan

Continuing economic development in Jordan provides potential food marketing opportunities as a new group of prospective value-added food product consumers emerges. The growing demand for high-value foods such as organically produced items also provides a new potential value-added market for Jordanian farmers. No studies to our knowledge have examined consumer preferences toward organic food items within Jordan. This study provides an initial attempt to fill this knowledge gap by examining the market for organic food items from a demand perspective in order to increase the knowledge available to Jordanian farmers, food processors, and retailers.