Partial Round-Robin Comparisons with Perfect Rankings

In teaching the development of uniformly most powerful unbiased (UMPU) tests, one rarely discusses the performance of alternative biased tests. It is shown, through the comparison of two independent Bernoulli proportions, that a biased test (the Z test) can be more powerful than the UMPU test (Fisher's exact test—randomized) in a large region of the alternative parameter space. A more general example is also given.     

Using Fear Appeals in Warning Labels to Promote Responsible Gambling Among VLT Players: The Key Role of Depth of Information Processing

Video lottery terminals (VLT) are a highly lucrative gambling format, but at the same time they are among the most hazardous. Previous research has shown that threatening warnings may be an appropriate approach for promoting protective behavior. The present study explores the potential benefits of threatening warnings in the fight against compulsive gambling. A 4 × 2 factorial design experiment was used to test our model based on both Elaboration Likelihood Model and Protection Motivation Theory. 258 VLT adult players (58% males, 42% females) with various degrees of problem gambling were exposed to three threat levels (plus a control condition) from two different sources (i.e., either a medical source or a source related to the provider of VLT’s). Our results show that both higher threat warnings and the medical source of warnings enhance Depth of Information Processing. It was also found that Depth of Information Processing affects positively attitude change and compliance intentions. The theoretical and managerial implications are discussed.     

Unequal Exchange? Recent Transfers of Agricultural Resources and their Implications for Developing Countries

Plant genetic resources constitute the biological basis for plant breeding and future agricultural development. Their transfer from developing to developed countries over centuries has sometimes been viewed as an example of exploitation, if not ‘biopiracy’. Modern gene flows are different in character and magnitude from historic exchanges, however. This article examines current patterns and finds that developing countries are major net recipients of germplasm samples from CGIAR centres, particularly if ‘improved materials’ are considered. Potentially problematic, intellectual property rights do not currently present major barriers to the availability and use of genetic resources by developing countries. Proposals to restrict flows and redress perceived injustices may reduce the benefits accruing at present to developing countries from germplasm exchanges.