Professions as "callings"

The idea of an occupation as a "calling" refers to some moral and perhaps religious motives and to a vision of the larger ends and purposes that work serves. Professions are characterized by mastery of technical information, concepts and theories that guide choices, institutionalization that exercises social controls, and, at least traditionally, a service orientation. "Calling" without professionalization is inept, and a profession without a calling lacks moral and humane roots, loses human sensitivity, and restricts the vision of the purposes of human good that are served.     

Development of Vocal Protests From 3 to 18 Months

Infants often protest the activities of their caregivers, and this particular social interaction may provide an important window on early communication and its development. This study used naturalistic methods to investigate the development of vocal protests. Fifteen mother‐infant dyads at each of 5 ages, from 3 to 18 months, were observed at home. Maternal behaviors of caregiving and prohibiting were tallied from videotapes, as were infants' protests of these behaviors. Maternal caregiving decreased with age, but maternal prohibitions increased. There were no changes over age in the probability of protesting maternal caregiving behavior; however, 12‐month‐olds were more likely to protest prohibitions than 6‐ or 8‐month‐olds. Older infants were also more likely to use intense protests, such as screams, than younger infants. These age‐related changes were mirrored by the differences in prohibitions and protests observed between 8‐month‐olds who could crawl and those who could not. Findings from this study were related to previous research on infant crying as an important part of the prelinguistic communication system.     

Rebates, inventories, and intertemporal price discrimination

We demonstrate that universally redeemed rebates can increase manufacturer profits by reducing the incentives of downstream retailers to hoard inventories when optimal wholesale prices vary predictably over time. By bypassing retailers and making direct contracts with buyers, the manufacturer can increase the variations in effective prices paid by consumers without concomitantly creating larger incentives for retailers to hold inventories. During profitable, high-demand periods, manufacturer revenues are ordinarily constrained by'competition'from retailer inventories, thus limiting profits. However, by selectively offering rebates to consumers while maintaining high wholesale prices, low-demand periods can be accommodated without inducing retailer hoarding.     

Describing the Dynamics of Attention to TV Commercials: A Hierarchical Bayes Analysis of the Time to Zap an Ad

This paper provides insights into the dynamics of attention to TV commercials via an analysis of the length of time that commercials are viewed before being 'zapped'. The model, which incorporates a flexible baseline hazard rate and captures unobserved heterogeneity across both consumers and commercials using a hierarchical Bayes approach, is estimated on two datasets in which commercial viewing is captured by a passive online device that continually monitors a household's TV viewing. Consistent with previous findings in psychology about the nature of attentional engagement in TV viewing, baseline hazard rates are found to be non-monotonic. In addition, the data show considerable ad-to-ad and household-to-household heterogeneity in zapping behavior. While one of the datasets contains some information on characteristics of the ads, these data do not reveal any firm links between the ad heterogeneity and the ad characteristics. A number of methodological and computational issues arise in the hierarchical Bayes analysis.     

Business Travel from the Traveller’s Perspective: Stress,Stimulation and Normalization

For growing numbers of businesspeople, managers and public officials, work involves travel. This study investigates what business travel means to travellers. What are their experiences of travel and what are the consequences of travel for their professional and personal lives? Qualitative interviews with frequent business travellers and corporate travel managers show that travel may be both stressful and stimulating. It may be associated with physical and psychological strain, increased workloads and difficulties in balancing work and private life, but also with enriching experiences, social and professional status and a cosmopolitan identity. It may also promote travellers’ professional careers. However, in some respects, an ongoing normalization of travel seems to have moderating effects on both stress and stimulation among travellers. This normalization occurs on three different levels: the societal, organizational and individual.     

Conservative prior distributions for variance parameters in hierarchical models

Bayesian hierarchical models typically involve specifying prior distributions for one or more variance components. This is rather removed from the observed data, so specification based on expert knowledge can be difficult. While there are suggestions for “default” priors in the literature, often a conditionally conjugate inverse‐gamma specification is used, despite documented drawbacks of this choice. The authors suggest “conservative” prior distributions for variance components, which deliberately give more weight to smaller values. These are appropriate for investigators who are skeptical about the presence of variability in the second‐stage parameters (random effects) and want to particularly guard against inferring more structure than is really present. The suggested priors readily adapt to various hierarchical modelling settings, such as fitting smooth curves, modelling spatial variation and combining data from multiple sites.     

The effect of mixing-distribution misspecification in conjugate mixture models

Parametric mixture models are commonly used in the analysis of clustered data. Parametric families are specified for the conditional distribution of the response variable given a cluster-specific effect, and for the marginal distribution of the cluster-specific effects. This latter distribution is referred to as the mixing distribution. If the form of the mixing distribution is misspecified, then Bayesian and maximum-likelihood estimators of parameters associated with either distribution may be inconsistent. The magnitude of the asymptotic bias is investigated, using an approximation based on infinitesimal contamination of the mixing distribution. The approximation is useful when there is a closed-form expression for the marginal distribution of the response under the assumed mixing distribution, but not under the true mixing distribution. Typically this occurs when the assumed mixing distribution is conjugate, meaning that the conditional distribution of the cluster-specific parameter given the response variable belongs to the same parametric family as the mixing distribution.     

Finance and innovation in British small independent firms

This paper is concerned with the effects of internal and external capital investment funding patterns on the innovativeness of British small independent firms. By using a combined sample of firms from the relatively prosperous South East and the more problematic Scottish development region, an additional diverse regional economic perspective is given to data initially presented in a national context. Beyond a presentation of the extent of external borrowing, the paper seeks to establish the characteristics of firms obtaining external funds and to assess whether this external capital borrowing sub-sample is mainly comprised of low technology firms in decline, or of high technology firms fueling innovation-led expansion. Data is included on the role of both public and private loan agencies in the external funding process. Conclusions are based on the pattern of results and focus on ways in which the delivery of financial aid might be improved to assist expansion, particularly in fast growing high technology small firms.