Retailers' press release activity: market signals for stakeholder engagement?

PURPOSE – To increase understanding of the role, content and effectiveness of press releases. DESIGN/METHODOLOGY/APPROACH – Qualitative and quantitative analyses of UK supermarkets' press releases in 2001/2002, a medium previously little researched in marketing, are undertaken. FINDINGS – Supermarkets seek stakeholder engagement on diverse issues with different mixes of groups. Treating releases as market signals demonstrates the important role of the press as filters and interpreters. Intended messages frequently fail to reach target audiences, and when they do can be significantly reinterpreted, so that positive claims are reported critically and negatively. Larger chains apparently produce more releases and gain more newspaper coverage, but generally volume of releases does not improve likelihood of press coverage. RESEARCH LIMITATIONS/IMPLICATIONS – The nature of qualitative data, the limited time frame, and possible omissions from source archives. PRACTICAL IMPLICATIONS – As level of coverage varied independently of turnover, higher release activity of larger chains was questioned. Seeking differentiation through press releases becomes problematic with the press as filters. ORIGINALITY/VALUE – This paper increases knowledge of press releases as market communications, and contributes to the literature of market signalling, notably emphasising the press as important signal intermediaries

Metastability in a stochastic neural network modeled as a velocity jump Markov process

One of the major challenges in neuroscience is to determine how noise that is present at the molecular and cellular levels affects dynamics and information processing at the macroscopic level of synaptically coupled neuronal populations. Often noise is incorprated into deterministic network models using extrinsic noise sources. An alternative approach is to assume that noise arises intrinsically as a collective population effect, which has led to a master equation formulation of stochastic neural networks. In this paper we extend the master equation formulation by introducing a stochastic model of neural population dynamics in the form of a velocity jump Markov process. The latter has the advantage of keeping track of synaptic processing as well as spiking activity, and reduces to the neural master equation in a particular limit. The population synaptic variables evolve according to piecewise deterministic dynamics, which depends on population spiking activity. The latter is characterised by a set of discrete stochastic variables evolving according to a jump Markov process, with transition rates that depend on the synaptic variables. We consider the particular problem of rare transitions between metastable states of a network operating in a bistable regime in the deterministic limit. Assuming that the synaptic dynamics is much slower than the transitions between discrete spiking states, we use a WKB approximation and singular perturbation theory to determine the mean first passage time to cross the separatrix between the two metastable states. Such an analysis can also be applied to other velocity jump Markov processes, including stochastic voltage-gated ion channels and stochastic gene networks

Changes in dominant Escherichia coli and antimicrobial resistance after 24 hr in fecal matter.

Intestinal bacteria carry antimicrobial resistance (AMR) genes in mobile genetic elements which have the potential to spread to bacteria in other animal hosts including humans. In fecal matter, Escherichia coli can continue to multiply for 48 hr after being excreted, and in certain environments, E. coli survive long periods of time. It is unclear the extent to which AMR in E. coli changes in the environment outside of its host. In this study, we analyzed changes in the population structure, plasmid content, and AMR patterns of 30 E. coli isolates isolated from 6 chickens (cloacal swabs), and 30 E. coli isolates from fecal samples (from the same 6 chickens) after 24 hr of incubation. Clonality of isolates was screened using the fumC gene sequence and confirmed in a subset of isolates (n = 14) by multi-locus sequence typing. Major shifts in the population structure (i.e., sequence types) and antibiotic resistance patterns were observed among the numerically dominant E. coli isolates after 24 hr. Four E. coli clones isolated from the cloaca swabs and the corresponding fecal samples (after 24 hr incubation) showed different antibiotic resistance patterns. Our study reveals that fecal matter in the environment is an intermediate habitat where rapid and striking changes occur in E. coli populations and antibiotic resistance patterns

The Giant Branches of Open and Globular Clusters in the Infrared as Metallicity Indicators: A Comparison with Theory

We apply the giant branch slope-[Fe/H] relation derived by Kuchinski et al. [AJ, 109, 1131 (1995)] to a sample of open clusters. We find that the slope of the giant branch in K vs. (J-K) color-magnitude diagrams correlates with [Fe/H] for open clusters as it does for metal-rich globular clusters but that the open cluster data are systematically shifted to less negative values of giant branch slope, at constant [Fe/H]. We use isochrone models to examine the theoretical basis for this relationship and find that for a given value of [Fe/H], the slope of the relationship remains constant with decreasing population age but the relation shifts to less negative values of giant branch slope with decreasing age. Both of these theoretical predictions agree with the trends found in the data. Finally, we derive new coefficients for the giant branch slope-[Fe/H] relation for specific members of 3 populations, metal-rich globular clusters, bulge stars and open clusters.Comment: 16 pages including 3 figures (AASTEX), AJ Accepted, also available at http://www.astronomy.ohio-state.edu/~martini/pubs.htm

How Not to Defend the Liberal Arts

It\u27s a myth that the sciences have theories and methods and the humanities don\u27t, and it\u27s a mistake to scapegoat theory and professionalization for the current plight of the humanities and liberal arts

State of the Discipline: Comparative Literature and Transdisciplinarity

An inquiry into the practices and applications of comparative literature and transdisciplinarity

Critique and Theory in the History of the Modern Humanities

What role has poststructuralist literary, critical, and cultural theory played in the making of the humanities, particularly in the period between 1968 and the present, and what role should theory have going forward as we come to terms with the corporatization of higher education, with its stress on practical skills, vocational training, and on measuring concrete learning outcomes? Exploring these questions requires confronting - and linking - two key issues currently at the core of sometimes-fierce debates about the humanities in the West, and particularly in t he US. T he first issue has to do with whether or not theory since 1968 has served to undermine the traditional coherence of a humanities education, and the second has to do with how humanists and their supporters respond rn assertions the humanities have little value because they do not teach students practical skills. In the US in particular these two issues have gotten intertwined. I will be arguing that since theory has always been central to the humanities it is a mistake to argue it has somehow undermined and marginalized them

Short Interest and Stock Returns

Using a longer time period and both NYSE-Amex and Nasdaq stocks, this paper examines short interest and stock returns in more detail than any previous study and finds that many documented patterns are not robust. While equally weighted high short interest portfolios generally underperform, value weighted portfolios do not. In addition, there is a negative correlation between market returns and short interest over our whole period. Finally, inferences from short time periods, such as 1988-1994 when the underperformance of high short interest stocks was exceptional or 1995-2002, when high short interest Nasdaq stocks did not underperform, are misleading.