Six Propositions on Public Participation and Their Relevance for Risk Communication

New societal obligations for communicating risk information are emerging in a variety of contexts. This article draws upon the lengthy societal experience with citizen participation programs to identify how risk communication efforts may be effectively structured and implemented. Six major propositions address such themes as means/ends differences in expectations, the timing of the program, the role of credibility and trust, the need for technical and analytical resources, differing thresholds of public involvement, and limitations upon current understandings. Key conclusions for the design of risk communication programs are set forth.     

The effect of 6 months training on leg power, balance, and functional mobility of independently living adults over 70 years old

Where strength training has been used in conjunction with functional-task training in older people, not only have there been improvements in leg strength but also improved function has been measured (e.g., Skelton & McLaughlin, 1996). Many studies use participants from care homes rather than community dwellers. We investigated changes in leg power, balance, and functional mobility in community-dwelling sedentary men and women over 70 years of age (n = 6 for training group [TR]; n = 10 for control group [CN]). Progressive training took place over 24 weeks using seated and nonseated exercise. For TR, leg power increased 40%, from 108 +/- 40 to 141 +/- 53 W (p < .01); dynamic balance increased 48%, from 22.3 +/- 7.9 to 33.1 +/- 6.1 cm (p < .01; functional reach); and functional mobility increased 12%, from 7.46 +/- 1.32 to 6.54 +/- 1.41 s (p < .05; timed walk). CN showed no significant change. In conclusion, a community-based exercise program led to large improvements in leg-extensor power, dynamic balance, and functional mobility.     

Robust methods in econometrics

This survey of recent developments in robust estimation and inference is directed primarily toward econometricians. It is argued that many of the techniques in common use in econometrics are highly sensitive to unverified hypotheses. Recent progress in designing alternative robust procedures is described and some prospects for future developments are discussed.     

Titin--springing back to youth?

Mutations in the muscle protein titin have been linked to dilated cardiomyopathy, a condition in which the heart chambers are enlarged and blood is ineffectively pumped, in humans and in animal models. This protein, which is a component of sarcomeres, provides essential scaffolding for other muscle proteins and acts as a spring to confer passive elasticity on the cardiomyocyte. Several titin isoforms exist, and they display varying size and degrees of elasticity. We review two interesting reports that show how variations in titin isoforms might be implicated in cardiac failure.     

Estimating the Structure of Agricultural Investment: A Stochastic- Coefficients Approach

Two approaches, a flexibie-accelerator model and a stochastic-coefficients alternative, are used to estimate the structure of aggregate agricultural investment. Structural estimates of the adjustment rates for each model differ. The stochastic-coefficients model, however, performs better in out-of-sample forecasting.     

Diversity in sociology: Problem or solution?

Some of sociology’s recent internal critics (e.g., Turner and Turner, 1990; Halliday and Janowitz, 1992; Collins, 1986; Gans, 1990; Crane and Small, 1992) suggest that the discipline's diversity of theoretical, methodological and substantive foci leave it in a weakened position for achieving individual and collective ends. Other sociologists (e.g., D'Antonio, 1992; Roos and Jones, 1993; Stacey and Thorne, 1985) argue that substantive diversity has made the discipline attractive to a greater variety of previously underrepresented groups, particularly women, groups that have, in turn, contributed to sociology’s substantive diversity. This paper reports on a content analysis of 2,016 articles from North American sociology journals in 1936, 1956, 1976, and 1996 as well as from chemistry, anthropology, economics, political science, and psychology journals in 1996. The analysis focused on a number of, often contradictory, hypotheses drawn from the competing views of sociology's diversity with respect to its substantive concerns and its gender composition. It finds, for instance, that there is more substantive diversity in today's sociology journal articles than there was earlier, at least when diversity is measured in terms of fields that are reputed to be attractive to women. This may not be surprising, since more women are writing sociology journal articles than ever before. Moreover, the substantive diversity seems to be related to more, not less, funding of sociological research. It is, of course, a trite remark — one made more frequently by sociologists than by their gibing critics — that sociology has not yet come to the development which commands from its adherents wholehearted agreement as to the objectives to be aimed at, the field to he limited, and the methods to be used. Gladys Bryson, 1936