A proof of the strong no loop conjecture

The strong no loop conjecture states that a simple module of finite projective dimension over an artin algebra has no non-zero self-extension. The main result of this paper establishes this well known conjecture for finite dimensional algebras over an algebraically closed field.Comment: 9 page

Review of: James M. Wilce. Crying Shame: Metaculture, Modernity, and the Exaggerated Death of Lament. Oxford: Wiley-Blackwell

This is a postprint (accepted manuscript) version of the article published in Ethos 38(3):1-3. The version made available in Digital Common was supplied by the author.Accepted Manuscrip

Bayesian model comparison and model averaging for small-area estimation

This paper considers small-area estimation with lung cancer mortality data, and discusses the choice of upper-level model for the variation over areas. Inference about the random effects for the areas may depend strongly on the choice of this model, but this choice is not a straightforward matter. We give a general methodology for both evaluating the data evidence for different models and averaging over plausible models to give robust area effect distributions. We reanalyze the data of Tsutakawa [Biometrics 41 (1985) 69--79] on lung cancer mortality rates in Missouri cities, and show the differences in conclusions about the city rates from this methodology.Comment: Published in at http://dx.doi.org/10.1214/08-AOAS205 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org

The moderating role of political affiliation in the link between flooding experience and preparedness to reduce energy use.

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.Research suggests that highlighting links between local weather events and climate change can help promote climate change engagement. Yet, the evidence for the relationship between weather experiences and climate change attitudes has been mixed. Here we argue that obtaining an accurate assessment of the contribution of weather experiences to climate change engagement necessitates explicit evaluation of factors such as values and identities that influence the way weather experiences are interpreted and integrated into climate change attitudes. We re-analysed data from a prior study in which reported flood experience was found to be indirectly linked to preparedness to reduce energy use among UK residents. Overall, flood experience was positively linked with perceived vulnerability and negatively linked with uncertainty about climate change, but the purported indirect relationship between flood experience and preparedness to reduce energy use was observed among left and not right-leaning voters. We concluded that assessing interactions between extreme weather experiences and political affiliation lends valuable nuance to evaluation of the effects of such experiences on climate change perceptions and attitudes. Highlighting links between climate change and flooding may have varying levels of influence on climate change engagement depending on individuals’ political affiliation