Food System Dynamics (E-Journals)
Not a member yet
929 research outputs found
Sort by
Price Transmission in Vertical Dairy Chains: The Italian Case
Get PDFAt a theoretic level, price transmission does not provide a clear signal of competitiveness as many conditions may induce stickiness and even asymmetry in the speed of adjustment to positive and negative changes. While evidence from past EU studies for the dairy sector is mixed, several studies have found evidence of asymmetry in particular countries. However, none to our knowledge have considered evidence for Italy. We examine price dynamics within the chain and test for presence of asymmetry in the transmission of price changes along the chain. Using a parametric test of asymmetry in a multivariate VECM, we find strong evidence of symmetry in co-movement. To explore whether these results are robust with respect to nonlinearity we estimate threshold VECM models and also find strong evidence to reject asymmetry except for the transmission between raw milk and wholesale butter prices. While inference with respect to competitiveness of markets cannot be inferred from evidence of asymmetry, findings of symmetry confirm that the market organization and performance is not controlling price change to be asymmetric
Attribute Non-Attendance and Satisficing Behavior in Online Choice Experiments
Get PDFWhile a successful survey requires engaged and attentive respondents, careless survey completion remains a great concern in online market research. In this article, we test metrics of engagement in an online willingness-to-pay (WTP) study for fresh blueberry attributes using a major U.S. panel company and evaluate the impact that poorly behaving respondents have on subsequent data quality. In doing so, we investigate in detail the complex joint relationship between attribute non-attendance (ANA) and measures of respondent engagement in web surveying. Using fixed latent classes, an approach known as the Equality Constrained Latent Class procedure, we export individual probabilistic class assignment of all levels of attribute attendance to cross reference with respondents who fail measures of engagement and fraudulence, and analyze their composition and impact on latent classes, indicating non-attendance of individual and combinations of attributes. We also analyze engagement impacts on the tau variance parameter in the scaled mixed logit model and find strong links to unnecessarily increased heterogeneity when not properly filtering poorly behaving respondents. While WTP estimates between respondents passing and failing engagement metrics are similar with the ECLC model, filtering failing respondents in the scaled mixed logit model reduces overall WTP estimates. Results have implications for both WTP researchers and general online market researchers
ICT, Innovation and Knowledge Challenges as seen by a World Conference of Experts
Get PDFThe World Conference on Computers in Agriculture (WCCA), held in San Jose Costa Rica in 2014, provided a forum where professionals from different disciplines exchanged research finding and experience on the use of ICT in a wide variety of contexts. This special issue is a collection of manuscripts by experts in agriculture and food related disciplines presenting the results of their research and experience on uses of ICT, which although not comprehensive in their scope, partially address the issues discussed in the editorial
Web Data Mining and Social Media Analysis for better Communication in Food Safety Crises
Get PDFAlthough much effort is made to prevent risks arising from food, food-borne diseases are an ever-present threat to the consumers’ health. The consumption of fresh food that is contaminated with pathogens like fungi, viruses or bacteria can cause food poisoning that leads to severe health damages or even death. The outbreak of Shiga Toxin-producing enterohemorrhagic E. coli (EHEC) in Germany and neighbouring countries in 2011 has shown this dramatically. Nearly 4.000 people were reported of being affected and more than 50 people died during the so called EHEC-crisis. As a result the consumers’ trust in the safety of fruits and vegetables decreased sharply.In situations like that quick decisions and reaction from public authorities as well as from privately owned companies are important: Food crisis managers have to identify and track back contaminated products and they have to withdraw them from the market. At the same time they have to inform the stakeholders about potential threats and recent developments. This is a particularly challenging task, because when an outbreak is just detected, information about the actual scope is sparse and the demand for information is high. Thus, ineffective communication among crisis managers and towards the public can result in inefficient crisis management, health damages and a major loss of trust in the food system. This is why crisis communication is a crucial part of successful crisis management, whereas the quality of crisis communication largely depends on the availability of and the access to relevant information.In order to improve the availability of information, we have explored how information from public accessible internet sources like Twitter or Wikipedia can be harnessed for food crisis communication. In this paper we are going to report on some initial insight from a web mining and social media analysis approach to monitor health and food related issues that can develop into a potential crisis. We have chosen Twitter and Wikipedia as data sources for our study since they’re publicly accessible and reveal what people state about certain topics and what they are looking for in order to answer their questions
Business concept as a relational message: supermarket vs independent grocery as competitors for sustainability
Get PDFThe paper deals with a new competition situation between a large consumer co-operative and a very small local food shop as its rival. While both businesses are selling food, their business concepts look very different. These concepts are analysed as ideology, identity and shopkeeper/retailer speech. The results show the deep cutting change in trade introduced by the small food shop as concern for sustainable food system and social relations as resources for new community building, suggesting conditional possibilities for further business growth. The large retailer has problems in answering the challenge as its concept seems to exclude concern for food system, the trade includes economic interests and rather negligible social relations. In principle, the small contester could succeed in expanding its business model through staying small and proliferating, supporting small farms’ economic viability. The large retailer could succeed by investing in launching more local and organic produce and thereby developing both primary production and processing capacity in a lagging rural region. The study shows the importance of the business concept as a condition and limitation for further growth
Cashew Chain Value in Guiné-Bissau: Challenges and Contributions for Food Security. (A Case Study for Guiné-Bissau)
Get PDFGuiné-Bissau is a recent example of political stabilization after a recent period of instability, where the international community can play an important role in cooperation and development, but with innovation and new effective policies. Food security is certainly one of the big issues to be addressed and cashew production and respective chain value one of the main opportunities to improve the quality of life for many families. Guinea-Bissau can be considered one of the most fragile countries in Sub-Sahara Africa, but at the same time with enormous economic potential. Poverty alleviation is very much dependent from agricultural activities and agribusiness will be always at the core of the most possible solutions. Within those possible solutions the contribution of the cashew sector is crucial, which has been playing already a key role in the economy and in the family survival equation. More than 80% of the families depend from agricultural activities and most of them are linked to the production of cashew. This crop represents more than 90% of exports, and at the same time is responsible for income alleviation resources at local family base. However Cashew expansion is a very recent phenomena, with about 20 years of success, beyond all political “turmoil”. Today the country is the second biggest in Africa, after Ivory Coast, and the fourth worldwide ( also after India and Vietnam). Exports were around 20 thousand tons in 1990 and close to 200 thousand tons in the last year’s production. But the most important factors to be considered in a cash crop business is also a very “unique” structure of production, mostly family based and where the average dimension of production per family is dominantly between 1 to 2 hectares. Very much related to those structural characteristics, which vary by region is the role of this crop in the food security dimension of the families, which is calculated to represent in average 4,8/12 months of income needs for food. The research address the Caju chain value in Guiné-Bissau, added value possibilities with transformation, better markets, improved institutional environment and other alternatives aiming to promote the global value creation but also the dynamics of the food system able to promote the family welfare and a sustainable development process
Aquaculture production and use of insects for feed: a consumer perspective
Get PDFWorldwide, aquaculture is assuming ever more importance in diminishing the pressure on wild stocks in the seas. Prices of feed used in farming fish are increasing, due the rise in demand. Research on sustainable sources of feed was recently intensified and insects as meal to substitute soybean and fish meals and oils seems a promising field. Consequently we explored future consumer attitude toward the consumption of fish farmed on insect meals, as a mean of enhancing the sustainability of the farming system in aquaculture. We focused our attention on Italian consumers of fish and the results show a sensitive consumer, willing to try an innovative product, interested in research to improve the safe-guarding of marine resources
Explaining the German hog price cycle: A nonlinear dynamics approach
Get PDFWe investigated German hog-price dynamics with an innovative ‘diagnostic’ modeling approach. Hog-price cycles are conventionally modeled stochastically—most recently as randomly-shifting sinusoidal oscillations. Alternatively, we applied nonlinear time series analysis to empirically reconstruct a deterministic, low-dimensional, and nonlinear attractor from observed hog prices. We next formulated a structural (explanatory) model of the pork industry to synthesize the empirical hog-price attractor. Model simulations demonstrate that low price-elasticity of demand contributes to aperiodic price cycling – a well know result – and further reveal two other important driving factors: investment irreversibility (caused by high specificity of technology), and liquidity-driven investment behavior of German farmers
Systematic Heterogeneity:How to Combine Smartphone Related Apps with FIspace
Get PDFFIspace represents an Internet based B2B collaboration platform that can be used by actors along the supply chain, and specifically the agri-food chain, facilitating the design and usage of inter-organisational workflows. The FIspace platform was developed by using FIWARE, a European initiative to develop technologies for a Future Internet. At the same time, the requirements of actors from an agri-food related B2B environment were analysed. One of the key requirements was the demand for smartphone-based apps that can be easily used by any actor at any time in the scope of a B2B relationship of different organisations. However, realising inter-organisational workflows with a combination of smartphones and a platform for B2B collaboration raises business related requirements that are specifically in relation to interoperability and security. Therefore, the architectural principles of FIspace supported ecosystems are presented and the concept of developing FIspace software applications is detailed. The latter provides domain specific features and enables a systematic usage of heterogeneous components in business related ecosystems. Furthermore, different development strategies for smartphone apps are analysed to discuss the related implications with respect to effort, costs and interoperability when aiming at a combination with a FIspace supported ecosystem. This is compared with the general principles to develop features within a FIspace ecosystem to systematically identify the implications when integrating heterogeneous software and hardware solutions. The purpose of this paper is to present those design principles that shall help to systematically analyse end-user requirements, which need to be taken into account when developing or designing changes and extensions of a FIspace supported business ecosystem with the help of smartphone apps. Therefore, the paper addresses specifically software developers intending to use FIspace as well as business architects intending to change or design an ICT supported collaborative ecosystem
Business Concept as a Relational Message: Supermarket vs Independent Grocery as Competitors for Sustainability
Get PDFThe paper deals with competition for sustainability between two business concepts, the supermarket and the independent grocery, both selling local and organic food. The paper is based on Finnish case evidence with very oligopolistic retail structure and its empirical and the theoretical interest focuses on the nature of economic exchange relations of these business concepts. The study shows how the supermarket is driven by market and hierarchic as well as power relations, regarding both suppliers and consumers. The business concept includes weak choice editing and indicates ‘consumer versus producer via retailer’ set-up. The independent grocery is at its core a social and partnership based endeavour, entailing strong choice editing for sustainability through the ‘consumer cum producer via retailer’ set-up. However, the supermarket may include more local and organic food in its product range on market conditions, in need of customer management, while the grocery can expand by decentralized multiplication of its business concept. The grocery also adds a new market channel for family farmers enabling better use of local resources, thereby renewing the market. This study shows the importance of the business concept as a condition and limitation for further growth, and explains the business concept as a relational message for sustainability