A model of demand with interactions among consumers

The aim of this paper is to study emergent patterns of demand when there are social interactions between different consumers. Specifically, our concern is with the case in which consumers' preferences are influenced by the consumption behaviour of others. The analysis recognises three reference groups. The first is a peer group of similar consumers, with whom the individual interacts on a regular basis, and with whom the individual desires to share some consumption activities. The second is one or several contrast group(s), with which the individual seeks actively not to interact, and from whom the individual wishes to distinguish himself/herself. The third is an aspirational group, with whom the individual does not interact on a regular basis, but wishes that he/she did, and with whom the individual would like to share consumption activities, but cannot. In this relatively simple model, these groups influence the individual's behaviour. The paper derives steady state and dynamic properties of the distribution of consumption over users. The degree to which consumption is restricted to a small group of similar agents is determined by the strength of the contrast and aspiration effects. These effects also drive the distribution away from the natural distribution, i.e., the one that would prevail were consumers to consider only the properties of the good, and not the actions of other consumers. The paper discusses the potential application of this modeling framework in a large number of consumption settings.     

浅谈ZARA服装产品的品牌竞争力

服装产品是体现品牌综合实力的手段之一,它不仅包括产品的有形面貌与风格,同时也反映了企业对知识、技术、信息的把握是否能够满足目标消费群体的需求。本文希望通过对ZARA服装产品的分析,使我国服装企业学习到新的理念与手段,从而提高企业的市场竞争力。     

An application of clustering for strategic group analysis

Taxonomies, factor analysis and clustering are discussed as tools to investigate the structure of competitors within an industry (‘strategic groups’). An example using cluster analysis is presented as one means of operationalizing this concept. Careful definition and selection of the dimensions used to identify the boundaries between strategic groups (their mobility barriers) are particularly crucial in the effective application of analytical tools.     

Technology Sharing in Manufacturing Business Groups

Technology represents the primordial force for companies and organizations in securing long‐term competitiveness. In the intensive search to access new technology, organizations are more and more looking beyond the borders of the focal firm and becoming involved in various networks with suppliers, consultants, partners, and others. However, the distinction between the focal firm, on the one hand, and networks, on the other, is in this paper argued to be too extensive without intermediating nuances. Less focus is given to an in‐between perspective configured by business groups or concerns here defined as parent corporations with subsidiary companies. It is this perspective of business groups with characteristics between individual firms and open networks that is of interest in this paper. The focus is on manufacturing business groups in which the companies will typically have individual as well as common technologies. The research aim is to develop a framework to be used as an analytical tool for understanding and organizing technology sharing in manufacturing business groups. The research approach was to study technology sharing in a natural setting combining multiple in‐depth sources of evidence in a clinical research setting. A prestudy identified key dimensions in classifying cases leading to four clusters of typified cases. Data were gathered from meetings with 24 managers from various research and development (R&D) units who met regularly every other week during seven months, in‐depth interviews, internal documents and protocols, and workshops. Following the clinical field‐study approach, findings are theoretically validated in relation to literature. The analysis identifies and depicts four different types of technology‐sharing scenarios in manufacturing business groups. Each type has particular characteristics of its own. The four scenarios together provide a synthesized portfolio with different types of dimensions. A first dimension makes a distinction between sharing new technology development versus existing technology. Another distinguishes between technologies aimed at the whole business group and those aimed at specific segments. The two dimensions together comprise four different types of technology‐sharing alternatives. Each one of them can be used at the focal firm, and together, they are applicable from a business group perspective comprising technology‐sharing portfolios of manufacturing business groups.     

STRATEGIC GROUPS AND RIVALROUS FIRM BEHAVIOR: TOWARDS A RECONCILIATION

This research examines the question of whether rivalry is greater between or within strategic groups by utilizing more direct, dynamic and fine-grained measures of rivalry. Examining the competitive actions of firms in different strategic groups to determine if competitive responses were more likely to occur from firms in the same strategic group, or from firms in different strategic groups, the research found that competitive responses cannot be predicted by strategic group membership. Importantly, however, strategic group membership is a predictor of the manner by which firms compete with one another, or the frequency with which they undertake competitive actions, cut prices, instigate warfare and imitate rivals. © 1997 by John Wiley & Sons, Ltd.     

Deregulation without apology: A truncated survivor analysis of long-run efficiency gains in the U.S. trucking industry

Deregulation of the U.S. trucking industry is found to have promoted long-run technical efficiency among less-than-truckload carriers of general commodity freight. It did so by exposing all carriers to competition which caused the very largest group, hauling more than five billion ton-miles annually, to lose output share to smaller carrier groups. Their inability to survive in-full implies that efficiency gains were achieved by reducing the extent of operation under decreasing returns to scale. This conclusion conflicts with other recent findings that deregulation promoted long-run efficiency by creating new ways for all carriers, even the very largest, to achieve economies of scale. The discrepancy in conclusions is significant in that previous findings of continuous scale economies, post-deregulation, leave open the possibility of rising industry concentration with all due repercussions on consumer welfare. A more encouraging outlook emerges from the present survivor analysis which finds the minimum efficient size to be below one billion ton-miles annually. This finding strongly supports a prediction of vigorous competition in the future, at least for this one segment of the trucking industry.This study was funded by a Faculty Summer Research Grant from Villanova University. The author acknowledges and appreciates the Office of Research and Sponsored Projects at Villanova for its support.     

AIDS and food production in East and Central Africa: a research outline

AIDS has penetrated at least 42 countries in Africa. Death of Africans usually occurs within 3 years of diagnosis. Not much is currently known about the demographics of the disease or about its impact on economic and social behavior, farming, and food production. There is currently a food crisis in Africa, so it is appropriate to study how much of an impact this disease has on future food production. In order to study the problem, one must predict the spread of AIDS. 2nd, one must infer how labor loss effects current rural production. Labor loss will cause changes in organization of production, technology, and types of crops grown. As a crisis increases, certain groups will be cut out of the food distribution. Characterizations such as these allow the mapping of areas vulnerable to labor loss. Field analysis and modeling must substantiate the theories and predictions. This paper describes the research design which will be used by 2 researchers from the Overseas Development Group of the University of East Anglia to measure the impact of AIDS on food production, working initially in a high HIV - prevalent area in Uganda.     

Bias in Appraisal-Based Returns

This note quantifies and extends Giliberto's [AREUEA Journal 16(1)] analysis of bias in appraisal-based returns. An important clarification and distinction is made, defining two different perspectives from which one may view appraisal return bias. The Giliberto analysis addressed bias in the holding period return only. Here, after reviewing and extending Giliberto's analysis in this regard, bias is considered from another perspective, that of the arithmetic mean of a time-series of appraisal-based returns. The two types of bias are likely to be of opposite sign, thereby possibly offsetting one another, so that we may often observe very little bias in the means of empirical appraisal-based returns time-series.     

Asymmetric rivalry within and between strategic groups

Our study examines asymmetric rivalry within and between strategic groups defined according to the size of their members. We hypothesize that, owing to several forms of group‐level effects, including switching costs and efficiency, strategic groups comprising large firms expect to experience a large amount of retaliation from firms within their group and accommodation from the group comprising smaller firms. Small firms, on the other hand, expect to experience a small amount of retaliation from the group comprising large firms and no reaction from the other firms in their group. We estimate the effect of group‐level strategic interactions on firm performance. Our analysis reveals that the rivalry behavior within and between groups is asymmetric, which supports the dominant‐fringe relation between firms, as described in our hypothesis. Copyright © 2013 John Wiley & Sons, Ltd.     

A taxonomy of competitive retailing strategies

An important aspect of any scientific investigation involves classifying the phenomena being studied. This research focused on a taxonomic analysis of the limited domain of competitive retailing strategies employed by U.S. supermarket chains for generic brand grocery products. Using cluster analysis, an empirically derived taxonomy was developed, and the characteristics of firms in each of the four strategic groups were examined. In addition, the performance of particular strategic groups was analysed. Firms in one of the strategic groups (aggressive initiators) consistently indicated higher levels of success.     

An evaluation of the Connected Nation broadband adoption program

Closing the digital divide and increasing broadband adoption within households and communities continues to be a target for government and nonprofit groups. While a large number of studies have examined policies and programs aimed at improving broadband infrastructure availability, little analysis to date has focused on evaluating efforts to increase adoption. One of the most well-known programs focused on adoption is Connected Nation, which partnered with 14 states to provide local curricula aimed at raising residential connection rates. This analysis uses a generalized difference-in-difference methodology to evaluate the effectiveness of the Connected Nation program in 5 states during 2012 and 2013. The results indicate that participation in the Connected Nation program had no significant impact on broadband adoption rates. This paper represents a rigorous evaluation of one of the most well-known adoption-oriented programs and emphasizes that measurable impacts of such efforts may not accrue over the short term.     

World food consumption: Can we achieve a balance?

This article sets out to analyse the problem of inequalities in consumption levels between countries, and within countries between people in different income groups. It first examines food consumption, then an attempt is made to establish certain quantitative relationships between overconsumption and malnutrition. Finally, it explores methods which might make it possible to transfer food from one part of the world to another, entailing a reduction in food consumption in the industrialised countries.     

Organize around end-use markets

Companies can gain by changing their organization structure toward a market centered one clustered around market groups. An analysis is made of the gains and certain trade-offs that occur. The recommended new organization structure is illustrated. A number of questions and areas that deserve in-depth concern are pinpointed.     

Women's Groups in British Unions

Women's groups in unions are collective spaces within which women seek to advance their concerns and access empowering positions. This paper examines their pursuit of gender equality in unions. The need to explore unions and women's groups is heightened by women's significance as a source of union membership, and the connection between union revitalization and responsiveness to women. The paper uses case studies of two unions, MSF and USDAW, and seven women's groups. The analysis is structured by a typology of two frameworks: (i) a typology of gendered equality ideas derived from various literatures, and (ii) the dynamic and linked dimensions of Hyman's (1994) union organization model. Implications for research and theory, and for union policy and practice, are discussed.     

Integrating climate change,food prices and population health

The inter-related nature of food, health and climate change requires a better understanding of the linkages and a greater alignment of policy across these issues to be able to adequately meet the pressing social and health challenges arising from climate change. Food price is one way through which climate change may affect health. The aim of this study of the global and Australian food systems is to provide a whole-of-system analysis of food price vulnerabilities, highlighting the key pressure points across the food system through which climate change could potentially have the greatest impact on consumer food prices and the implications for population health. We outline areas where there are particular vulnerabilities for food systems and food prices arising from climate change, particularly global commodity prices; agricultural productivity; short term supply shocks; and less direct factors such as input costs and government policies. We use Australia as a high-income country case study to consider these issues in more detail. The complex and dynamic nature of pricing mechanisms makes it difficult to predict precisely how prices will be impacted. Should prices rise disproportionately among healthy foodstuffs compared to less healthy foods there may be adverse health outcomes if less expensive and less healthy foods are substituted. Higher prices will also have equity implications with lower socio-economic groups most impacted given these households currently spend proportionately more of their weekly income on food. The ultimate objective of this research is to identify the pathways through the food system via which climate change may affect food prices and ultimately population health, thereby providing evidence for food policy which takes into account environmental and health considerations.     

A note on effective laboratory size

Surprisingly little attention has been paid to the question of what size is desirable for a whole laboratory as distinct from the groups that comprise it. A semi-quantitative analysis shows that while very small laboratories are handicapped by restricted common services there is also a heavy penalty paid by very large laboratories in the extended path over which information must flow between the working scientists and the decision makers. It is. not desirable, therefore, to expand research effort by allowing laboratories to grow indefinitely in size.     

Urban agriculture,poverty, and food security: Empirical evidence from a sample of developing countries

Urban agriculture may have a role to play in addressing urban food insecurity problems, which are bound to become increasingly important with the secular trend towards the urbanization of poverty and of population in developing regions. Our understanding of the importance, nature and food security implications of urban agriculture is however plagued by a lack of good quality, reliable data. While studies based on survey data do exist for several major cities, much of the evidence is still qualitative if not anecdotal. Using a recently created dataset bringing together comparable, nationally representative household survey data for 15 developing or transition countries, this paper analyzes in a comparative international perspective the importance of urban agriculture for the urban poor and food insecure. Some clear hints do come from our analysis. On the one hand, the potential for urban agriculture to play a substantial role in urban poverty and food insecurity reduction should not be overemphasised, as its share in income and overall agricultural production is often quite limited. On the other hand, though, its role should also not be too easily dismissed, particularly in much of Africa and in all those countries in which agriculture provides a substantial share of income for the urban poor, and for those groups of households to which it constitutes an important source of livelihoods. We also find fairly consistent evidence of a positive statistical association between engagement in urban agriculture and dietary adequacy indicators.     

Measurement and characterisation of the Digital Divide of Spanish regions at enterprise level. A comparative analysis with the European context

Until now, a reduced number of research is observed on the adoption and use of ICTs in enterprises and on the digital divide (DD) between them at regional scale in Europe. What is meant by DD are the differences in the levels of digital development of the enterprises; being the digital development the degree of adoption and use of ICTs and e-commerce by the firms. The aim of this piece of work is to characterise and measure the DD in the Spanish regions and those in the countries of the European Union based on the data of their enterprises with more than 10 employees which have used ICTs. The methodology is developed in the following stages: 1) Construction of a synthetic index of digital development (Enterprise Digital Development Index –EDDI-) for countries in the EU and Spanish regions. The production of this index is carried out based on the factors obtained with the factor analysis (FA) with the aim of identifying the key variables which define the different EDDI components. These variables come from the “Community survey on ICT usage and e-commerce in enterprises” of Eurostat. 2) Classification of Spanish regions into the groups of European countries with a similar level of EDDI components based on the discriminant analysis. Those groups are previously obtained by using cluster analysis. And 3) Comparative analysis of the DD between the Spanish regions and those in countries of the EU based on EDDI components and the identified groups. The study provides a synthetic index (EDDI) at European scale comprising 3 dimensions which permits obtaining: i) a ranking from more to less digital development of countries and regions permitting the measurement of the DD among them is established; and ii) a typology of European countries and Spanish regions is defined according to the 3 dimensions of EDDI. The main results of this piece of work show that the Spanish regions at enterprise level: i) are in a medium or higher level of digital development than their European counterparts, presenting, furthermore, a lower DD between them in relation to what happens in European countries; ii) stand out for having a higher digital inclusion than European countries in the ICTs related to infrastructures of internet access and for the interaction with the public authorities; and iii) have a digital development deficit in the integration of ICTs for e-commerce.     

企业财务状况质量三维综合评价体系的构建与检验——来自我国A股制造业上市公司的经验证据

本文从企业价值驱动因素中寻找财务分析的新视角,应用增长、盈利、风险三维平衡原理,选择有质量的适度增长为评价标准,建立基于企业价值创造的财务状况质量三维综合评价理论框架,从而将财务分析视角从相对静态的短期层面延伸至较为动态的长期层面。在此基础上,本文结合新准则在会计信息披露方面的主要变化,构建出一套较为完整的企业财务状况质量评价财务指标体系,并采用我国A股制造业上市公司的财务数据对其有效性加以检验。