On ratio and product methods of estimation in sampling

Abstract  In sample surveys the ratio (product) method of estimation is quite effective when there is a positively (negatively) high correlation between the study variate and an auxiliary variate on which supplementary information is available. This paper considers four estimators suited for cases where these correlations are only moderate and gives a rule of thumb for choosing among these and the traditional estimators. Such a choice needs a good guess of the interval containing a certain parameter k , which may not be hard in survey practice. A numerical example has been included for the case of positive correlation for illustration. An extension for using multiauxiliary information is also considered.     

ISSUES OF AGRICULTURAL POLICY IN A HISTORICAL PERSPECTIVE

Growth in agricultural productivity and the stimulus of price supports have led to overproduction in Western Europe: in particular, the European Community has become a smaller importer and even a major exporter of several products. But as prices in the EC are usually above world levels, this requires expensive subsidisation and leads to trade conflicts. Adjustments now forced on the CAP mean a greater cost-price squeeze, besides imposing quotas on the dairy sector. Policy aims relating to farm incomes and to market balance have thus become very difficult to reconcile. Future policy will also have to take more account of the impact of farming on the environment and of the role of agricultural activity in rural communities. Are there policy instruments, such as direct aids, which can help to achieve such diverse goals? What are the implications of changing circumstances for farming systems, and in particular can low-input systems offer an alternative to the ‘productivist’ farming model?     

Valuing Quality Attributes and Country of Origin in the Korean Beef Market

For beef exporters, one of the important questions in the Korean beef market is why Korean consumers are willing to pay almost three times more for domestic Korean beef than they pay for imported beef. To answer this question, we surveyed 1,000 shoppers in Seoul, Korea, and conducted a conjoint analysis on consumers’ willingness to pay (WTP) for country equity of domestic vs. imported beef and quality attributes of marbling, freshness, genetically modified organism (GMO)‐free feed ingredients and antibiotic‐free production. Among all factors contributing to the price differentials, the most important factor seems to be the country of origin followed by the use of GMO feeds and antibiotics in beef production, marbling grade and freshness. This study finds that Korean consumers value origins of imported beef approximately $14/lb less than the Korean origin. Korean consumers’ valuation of beef quality and country of origin differs by some demographic groups: older vs. younger generations, homemakers vs. non‐homemakers and consumers who prefer to purchase packaged beef vs. consumers who prefer to purchase butcher shop beef. Our empirical findings suggest that the top priority for beef exporters who wish to increase sales and value of their beef in the Korean market must be to counter Korean consumers’ strong ethnocentrism by improving the value of their country of origin.     

Benchmarking sales staffing efficiency in dealerships using extended data envelopment analysis

This study presents an approach to benchmark dealer performance in a business-to-business setting through a rigorous efficiency analysis of sales staff allocation. Using a series of basic and extended data envelopment analysis (DEA) models on data collected from a survey of self-reported financial and statistical information, this research assesses dealer efficiency and compares the efficiency scores to traditional financial benchmarking. Findings support the minimization of outsourcing services that are customer interactive and highly specific to a transaction to differentiate the dealer from its competition. Integrating the results from DEA models, manufacturers obtain a comprehensive view of allocating sales staff to increase dealer efficiency and generating a complementary approach to traditional financial ratio benchmarking in determining best practices to other dealers.     

Mapping the journey: visualising collaborative experiences for sustainable design education

The paradigm of design is changing. Designers now need to be equipped with the skills and knowledge that will enable them to participate in the global move towards a sustainable future. The challenges arise as Design for Sustainability deals with very complex and often contradictory issues. Collaborative learning experiences recognise that these complex issues can be addressed with the pooling of diverse knowledge, perspectives, cultures, skills and tools. Unless, however the process of collaboration is explored in detail, the opportunity for reflection, learning and improvement is lost. This paper proposes that by introducing and analysing collaboration within third level design education, the capacity for responsible design practice can be developed, leading to a transformative shift in how designers are taught as students and subsequently practice as professionals. Over two multidisciplinary projects devised and undertaken by design students from the University of Limerick (Ireland), Hogeschool Utrecht (Netherlands) and Virginia Commonwealth University (USA), the collaborative path is mapped and critical junctions identified. From this process of mapping and visualisation, collective narratives of the overall project experience are constructed (through the eyes of the participants and planners). This leads to a greater understanding and appreciation of the benefits and limitations of the collaborative experience.     

The Measurement and Behavior of Uncertainty: Evidence from the ECB Survey of Professional Forecasters

We examine matched point and density forecasts of output growth, inflation and unemployment from the ECB Survey of Professional Forecasters. We construct measures of uncertainty from individual histograms, and find that the measures display countercyclical behavior and have increased across all forecast horizons since 2007. We also derive measures of forecast dispersion and forecast accuracy, and find that they are not reliable proxies for uncertainty. There is, however, evidence of a meaningful co‐movement between uncertainty and aggregate point predictions for output growth and unemployment. These results are robust to changes in the composition of the survey respondents over time. Copyright © 2015 John Wiley & Sons, Ltd.     

Disclosure,conservatism and the cost of equity capital: A review of the foundation literature

In this review piece, we survey the literature on the cost of equity capital implications of corporate disclosure and conservative accounting policy choice decisions with the principle objective of providing insights into the design and methodological issues, which underlie the empirical investigations. We begin with a review of the analytical studies most typically cited in the empirical research as providing a theoretical foundation. We then turn to consider literature that offers insights into the selection of proxies for each of our points of interest, cost of equity capital, disclosure quality and accounting conservatism. As a final step, we review selected empirical studies to illustrate the relevant evidence found within the literature. Based on our review, we interpret the literature as providing the researcher with only limited direct guidance on the appropriate choice of measure for each of the constructs of interest. Further, we view the literature as raising questions about both the interpretation of empirical findings in the face of measurement concerns and the suitability of certain theoretical arguments to the research setting. Overall, perhaps the message which is most clear is that one of the most controversial and fundamental issues underlying the literature is the issue of the diversifiability or nondiversifiability of information effects.     

MANAGING SWITCHING COSTS IN MULTIPERIOD PROCUREMENTS WITH STRATEGIC BUYERS*

This article examines the use of switching costs by long‐lived strategic buyers to manage dynamic competition between rival suppliers. The analysis reveals how buyers may employ switching costs to their advantage. We show that when switching costs are high, a buyer may induce suppliers to price more competitively by credibly threatening to replace the incumbent supplier with his rivals. The implications of this finding for adoption of technology and firm organization are explored in settings in which the buyer is integrated with the suppliers and where the buyer is an outsourcer.