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41.
Dr. T. Michael Maher 《Population and environment》1997,18(4):339-372
Recent surveys show that Americans are less concerned about population than they were 25 years ago, and they are not connecting environmental degradation to population growth. News coverage is a significant variable affecting public opinion, and how reporters frame a problem frequently signals what is causing the problem. Using a random sample of 150 stories about urban sprawl, endangered species and water shortages, Part I of this study shows that only about one story in 10 framed population growth as a source of the problem. Further, only one story in the entire sample mentioned population stability among the realm of possible solutions. Part II presents the results of interviews with 25 journalists whose stories on local environmental problems omitted the causal role of population growth. It shows that journalists are aware of the controversial nature of the population issue, and prefer to avoid it if possible. Most interviewees said that a national phenomenon like population growth was beyond the scope of what they could write as local reporters. 相似文献
42.
This review of qualitative research examining young Indigenous Australians’ sexual health highlights the profoundly social nature of young people’s sexual lives. Nineteen peer reviewed published papers were identified for inclusion. Findings reveal efforts made by some young Indigenous Australians to control their sexual lives, mitigate risk and maintain their sexual health. The review identified factors which are conducive to sexual health risks and vulnerability, including incomplete knowledge about STIs and safer sexual practices; gossip and ridicule concerning sexual activity and its consequences; damaging expectations about male prerogatives with respect to sexual relationships; limited inter-generational communication about sexual health issues; inadequate school-based sexual health education; and tensions between Indigenous and biomedical explanations of sexual health issues. Future research priorities include a focus on young Indigenous people in cities and towns across Australia, and in regional and remote settings in New South Wales and Victoria; understanding how Indigenous cultural values support young people’s sexual health; young men’s sexual and service-based practices; and the experiences of same-sex attracted and gender diverse youth. This research would inform the design and delivery of culturally safe and acceptable sexual health services and programmes, underpinned by an understanding of factors in young Indigenous Australians’ everyday sexual lives. 相似文献
43.
Bivariate integer-valued time series occur in many areas, such as finance, epidemiology, business etc. In this article, we present bivariate autoregressive integer-valued time-series models, based on the signed thinning operator. Compared to classical bivariate INAR models, the new processes have the advantage to allow for negative values for both the time series and the autocorrelation functions. Strict stationarity and ergodicity of the processes are established. The moments and the autocovariance functions are determined. The conditional least squares estimator of the model parameters is considered and the asymptotic properties of the obtained estimators are derived. An analysis of a real dataset from finance and a simulation study are carried out to assess the performance of the model. 相似文献