Zur verteilungsfreien Ableitung der Streuung von Regressionskoeffizienten ohne Voraussetzung der Nullhypothese

Ohne Zusammenfassung     

Pricing Efficiency in the Mortgage Market

Traditionally, the presence of serial correlation has been presumed to indicate an inefficient market for financial assets. As Latham [15] discusses, while the absence of serial correlation implies market efficiency, its mere presence does not imply inefficiency. Rather, market efficiency is a characteristic of security pricing. This study investigates pricing efficiency in the mortgage market. Using mortgage loan quotations for 343 institutions over a 71-week period, the empirical findings show that a wide variety of mortgage contracts are efficiently priced.     

Breastfeeding versus infant formula: the Kenyan case

An Infant Feeding Practices Study (IFPS) in 1982 in Kenya, which included a cross-sectional survey of a weighted sample of 980 low and middle income Nairobi mothers who had given birth in the previous 18 months, found that most women breastfeed their infants for long periods, but many introduce alternate feeding, especially infant formula, in the 1st 4 months (86 and 50% of the infants were breastfed at 6 and 15 months respectively, but 50% of the 2 month-olds and 63% of the 4 month-olds were receiving substitutes, mostly formula). This is done largely out of the belief that infant formula is an additional health benefit. A workshop to discuss the findings of the IFPS and other available data, and to make policy recommendations urged the adoption of a policy of protection, support and promotion of breastfeeding. Since breastfeeding is already widely prevalent in Kenya, protection of breastfeeding should receive the 1st priority in policy related to infant feeding. Attention should be directed at at least 2 influences which help undermine breastfeeding: widespread availability and promotion of breast milk substitutes. Support for breastfeeding is viewed as the 2nd policy priority. Situations where support can play a helpful role are, women's paid employment outside the home, hospital practices, maternal morbidity, and difficulties in breastfeeding. Since promotion is the least cost effective of the 3 options, and most Kenyan women are already motivated to breastfeed, this should be the last priority. Promotion includes reeduction of mothers to make them better aware of the benefits of breastfeeding. The workshop recommended the dissemination of appropriate information, consisting of standarized messages based on clearcut guidelines, using mass media techniques.     

Environmental uncertainty and environmental scanning activities of nigerian manufacturing executives: A comparative analysis

This study investigated the relationship between perception of environmental uncertainty (PEU) and environmental scanning behavior of Chief Executive Officers of 47 manufacturing firms in Nigeria. The results indicated that perceived uncertainty in the environment was significantly higher for the task environment sectors than for the remote environment sectors; and as perceived uncertainty increased in a sector of the environment, scanning frequency and scanning interests also increased. The results were compared with those of prior research in the area of environmental scanning. The results show both the economic and political legal sectors of the environment to be more salient for Nigerian manufacturing executives than for their American counterparts.     

Workload control under continuous order release

Workload control is a production planning and control concept specifically designed for complex manufacturing environments. Past research on Workload control has been essentially focused on discrete order release. This means that release of orders to the shop floor takes places on a periodic basis. Continuous order release has been somehow neglected, in spite of its apparent potential for improving system performance, including the reduction of order flow times. This paper presents a simulation study of this order release approach. The study contributes for improving the basis for setting workload norms, selecting the workload control strategy and deciding upon routing alternatives under continuous order release.     

Personal and nonpersonal incentives in mail surveys: Immediate versus delayed inducements

A mail survey was conducted to empirically investigate contributions to charity as a method of stimulating responses to a mail survey. The research design included a control group and four experimental groups with the following treatments: a prepayment of $1.00 enclosed with the questionnaire (immediate personal reward), $1.00 promised upon return of the questionnaire with the respondent identified (delayed personal reward, no anonymity), $1.00 promised upon return of the questionnaire with no identification of the respondent (delayed personal reward, anonymity), and the promise of $1.00 contribution to a respondent-selected charity (delayed non-personal reward). The $1.00 prepayment yielded a statistically significant higher response rate than the $1.00 promised to charity or $1.00 promised upon return of the questionnaire. This study generally supports existing empirical foudnations of equity theory. An immediate personal reward yields a higher response rate than a delayed personal or non-personal reward.     

Analysis of the status and trends of applications of advanced manufacturing technologies in Russia

The article has analyzed trends in applying advanced manufacturing technologies in Russia in 2005–2014. The dynamics of technical process structures in the context of applications has been considered. The dynamics of the age structure and the structure of technologies in use in annual terms by the place of acquiring has been assessed. The start-up, availability, and removal balance of technologies has been formed, the effective start-up level, and possible ways to improve the state statistical indicators of innovation development have been determined.     

Nanotechnology and the new technological revolution: Expectations and reality

This paper reviews the existing mechanisms of innovative development in the world economy focusing on emerging technologies markets evolution on the example of nanotechnology. The question has been raised of whether nanotechnologies can provide the core of the new technological revolution, and whether these prospects exist for NBIC convergence. In this connection the development of the global market for nano-enabled products following the 2007–2009 crisis and the reliability of the related development forecasts have been assessed. Particular attention has been paid to peculiarities of nanoenabled product market structure and the impact of stagnating R&D costs in the field of nanotechnology.