An approximation method to derive confidence intervals for quantiles with some applications

Standard jackknife confidence intervals for a quantile Q _y (β) are usually preferred to confidence intervals based on analytical variance estimators due to their operational simplicity. However, the standard jackknife confidence intervals can give undesirable coverage probabilities for small samples sizes and large or small values of β. In this paper confidence intervals for a population quantile based on several existing estimators of a quantile are derived. These intervals are based on an approximation for the cumulative distribution function of a studentized quantile estimator. Confidence intervals are empirically evaluated by using real data and some applications are illustrated. Results derived from simulation studies show that proposed confidence intervals are narrower than confidence intervals based on the standard jackknife technique, which assumes normal approximation. Proposed confidence intervals also achieve coverage probabilities above to their nominal level. This study indicates that the proposed method can be an alternative to the asymptotic confidence intervals, which can be unknown in practice, and the standard jackknife confidence intervals, which can have poor coverage probabilities and give wider intervals.     

Development characteristics of Russia’s ground transport types at the present time

The state and development prospects of the leading sectors of Russia’s transport complex—automobile and railway types—are reviewed in the paper. Special attention is paid to the analysis of transport growth factors, including international ones, and problems of modernization of the infrastructure and railway stock. Some results of reforming rail transport are represented.     

Regional differentiation of coefficients of direct expenditures in input-output symmetric tables

The necessity to develop input-output regional tables on the basis of analysis of available regional technological coefficients and unit costs in physical and monetary terms is argued in this article.     

An Institutional Analysis of Corporate Social Responsibility in Kenya

There is little doubt that Corporate Social Responsibility (CSR) is now a global concept and a prominent feature of international business, with its practice localised and differing across countries. Despite the growing body of research focussing on CSR in developing countries, there is dearth research on CSR institutionalisation in African countries. Drawing on institutional theory (IT), this article examines the focus and form of CSR practice of companies in Kenya. It is evident from our findings that the nature and orientation of CSR differ across companies with operations only in Kenya and those headquartered abroad or with international operations. Significantly, firm-related drivers such as public relations and performance, as well as global institutional pressures explain the focus and form of CSR in Kenya. This article concludes that for the institutionalisation of CSR in Kenya, attention must be paid to conditions that stifle CSR uptake such as lack of government regulations, and the government’s capacity and commitment to enforce regulation. The establishment of functional CSR institutions and a vibrant civil society that advance civil regulation ought to be encouraged.     

The impact of education,experience and inner circle advisors on SME performance: insights from a study of public development centers

In this study, we investigate the effects of entrepreneurial human capital on SME performance using data on 2,713 SMEs within the European Union. Performance was measured in two ways: profitability as ROA and productivity as revenue per employee. Results indicate that both profitability and productivity are positively related to industry-specific knowledge possessed by the CEO-owner prior to starting up the firm and the general business knowledge acquired once the firm is up and running. Experience as a result of having previously worked in a firm in the same industry before starting a business was related to productivity, but there is no relation with profitability. There is a link between performance and inclusion of other CEO-owners in the founder’s inner circle of advisors. This relationship is positive when the advisor’s venture has experienced failure and negative when the advisor’s venture has been successful. We discuss the significance of these findings for research and practice.     

Customer relationship management and company performance—the mediating role of new product performance

Customer Relationship Management (CRM) is widely accepted as an effective approach for collecting, analyzing, and translating valuable customer information into managerial action. However, the potential of CRM has been investigated only in the context of existing products. CRM’s potential to aid in future new product development (NPD) has been neglected. We develop a conceptual framework in which multiple facets of CRM are linked to new product and company performance. We test this model based on a cross-functional sample consisting of 115 R&D and 122 Marketing managers from firms spanning multiple industries. The results provide evidence that CRM has a positive effect on new product performance and further, that this effect is moderated by CRM reward systems but not CRM technology. We also show that new product performance mediates the relationship between CRM and company performance. These findings have important implications for research and practice in both the CRM and NPD areas.     

Crisis of the euro zone and prospects of the euro

This paper analyzes problems of the eurozone, which are aggravated by the crisis. It proposes architectural transformations of the European monetary system targeted at combating the crisis and promoting economic growth and employment in today’s structurally inhomogeneous Europe.