The meta-analysis is a probabilistic technique that groups the results of several studies, approaches the same subject and produces a result that summarizes the whole. The results that are displayed in graphical form neither offer interactivity with the user, nor a user-friendly interface and...

Asynchronous discussion forums are among the most preferred tools chosen to foster learning opportunities and knowledge construction. To reveal the cognitive engagement evidenced in the transcripts of the discussion forums, this study presents 51 papers. 17 papers reported research on students'...

Abstract Standard measures of effect, including the risk ratio, the odds ratio, and the risk difference, are associated with a number of well-described shortcomings, and no consensus exists about the conditions under which investigators should choose one effect measure over another. In this...

Abstract In a recent BMJ article, the authors conducted a meta-analysis to compare estimated treatment effects from randomized trials with those derived from observational studies based on routinely collected data (RCD). They calculated a pooled relative odds ratio (ROR) of 1.31 (95 %...

Summary Krämer and Arminger in a preceding article in this volume insinuated that in a meta-analysis on childhood leukaemia in the vicinity of nuclear power plants (NPP) in five countries gross methodological errors had led to falsified statistics. Major assumptions were a) arbitrary exclusion...

Abstract Rooted in 20th century legislation, telecommunications policy has historically been conducted in separate wired and wireless silos. The explosion of wireless voice, data and video communications, however, has largely overtaken wired communications, yet these silos persist. This article...

Many U.S. employers have recently adopted less generous prescription drug benefits. In addition, in 2006 the U.S. began to offer prescription drug insurance to approximately 42 million Medicare beneficiaries. We used data on individual health insurance claims and benefit data from 1997 to 2003...

This special issue is a collection of papers that address three questions of critical importance to the design of eco-labeling marketing strategies and policies. These three questions deal respectively with the efficiency of eco-labels when considering market structure and trade, the credibility...

Images play a crucial role in inspiring and informing travelers throughout the tourism experience. Due to this, destination management/marketing organizations (DMOs) do their best to provide visually rich websites and mobile applications. Among the factors guiding online communication choices,...