Product market competition with differentiated goods and social welfare in the presence of an industry-wide union

Mainstream locus communis indicates that a more competitive product market leads to higher social welfare levels. Using a Conjectural Variation (CV) model, this research note analyzes the effects on welfare of different degrees of product market competition in a duopoly with differentiated goods. Bargaining between the firms and the industry-wide union occurs under the Efficient Bargaining (EB) model. The work indicates that, with close substitute goods, social welfare is maximized for the inter- mediate levels of market competition, whereas more independent goods lead to the standard result of a high welfare level under competitive markets.info:eu-repo/semantics/publishedVersio

The positive outlook study- a randomised controlled trial evaluating the effectiveness of an online self-management program targeting psychosocial issues for men living with HIV: a study protocol

Background: The emergence of HIV as a chronic condition means that people living with HIV are required to takemore responsibility for the self-management of their condition, including making physical, emotional and socialadjustments. This paper describes the design and evaluation of Positive Outlook, an online program aiming toenhance the self-management skills of gay men living with HIV.Methods/design: This study is designed as a randomised controlled trial in which men living with HIV in Australiawill be assigned to either an intervention group or usual care control group. The intervention group willparticipate in the online group program ‘Positive Outlook’. The program is based on self-efficacy theory and uses aself-management approach to enhance skills, confidence and abilities to manage the psychosocial issues associatedwith HIV in daily life. Participants will access the program for a minimum of 90 minutes per week over seven weeks.Primary outcomes are domain specific self-efficacy, HIV related quality of life, and outcomes of health education.Secondary outcomes include: depression, anxiety and stress; general health and quality of life; adjustment to HIV;and social support. Data collection will take place at baseline, completion of the intervention (or eight weeks postrandomisation) and at 12 week follow-up.Discussion: Results of the Positive Outlook study will provide information regarding the effectiveness of onlinegroup programs improving health related outcomes for men living with HIV

Evidence-based Kernels: Fundamental Units of Behavioral Influence

This paper describes evidence-based kernels, fundamental units of behavioral influence that appear to underlie effective prevention and treatment for children, adults, and families. A kernel is a behavior–influence procedure shown through experimental analysis to affect a specific behavior and that is indivisible in the sense that removing any of its components would render it inert. Existing evidence shows that a variety of kernels can influence behavior in context, and some evidence suggests that frequent use or sufficient use of some kernels may produce longer lasting behavioral shifts. The analysis of kernels could contribute to an empirically based theory of behavioral influence, augment existing prevention or treatment efforts, facilitate the dissemination of effective prevention and treatment practices, clarify the active ingredients in existing interventions, and contribute to efficiently developing interventions that are more effective. Kernels involve one or more of the following mechanisms of behavior influence: reinforcement, altering antecedents, changing verbal relational responding, or changing physiological states directly. The paper describes 52 of these kernels, and details practical, theoretical, and research implications, including calling for a national database of kernels that influence human behavior

Explaining Medically Unexplained Symptoms

Patients with medically unexplained symptoms comprise from 15% to 30% of all primary care consultations. Physicians often assume that psychological factors account for these symptoms, but current theories of psychogenic causation, somatization, and somatic amplification cannot fully account for common unexplained symptoms. Psychophysiological and sociophysiological models provide plausible medical explanations for most common somatic symptoms. Psychological explanations are often not communicated effectively, do not address patient concerns, and may lead patients to reject treatment or referral because of potential stigma. Across cultures, many systems of medicine provide sociosomatic explanations linking problems in family and community with bodily distress. Most patients, therefore, have culturally based explanations available for their symptoms. When the bodily nature and cultural meaning of their suffering is validated, most patients will acknowledge that stress, social conditions, and emotions have an effect on their physical condition. This provides an entree to applying the symptom-focused strategies of behavioural medicine to address the psychosocial factors that contribute to chronicity and disability.Les patients présentant des symptômes médicalement inexpliqués représentent de 15 à 30 % de toutes les consultations des soins primaires. Les médecins supposent souvent que des facteurs psychologiques sont à l'origine de ces symptômes, mais les théories actuelles de la causalité psychogène, de la somatisation et de l'amplification somatique ne peuvent expliquer tout à fait les symptômes inexpliqués fréquents. Les modèles psychophysiologiques et sociophysiologiques offrent des explications médicales plausibles pour la plupart des symptômes somatiques communs. Les explications psychologiques sont souvent communiquées inefficacement, ne répondent pas aux préoccupations des patients et peuvent mener ceux-ci à rejeter le traitement ou l'aiguillage en raison des stigmates éventuels. Dans toutes les cultures, de nombreux systèmes de médecine offrent des explications sociosomatiques, qui relient les problèmes de famille et de communauté à la détresse corporelle. Par conséquent, la plupart des patients disposent d'explications fondées sur la culture pour leurs symptômes. Lorsque la nature corporelle et le sens culturel de leur souffrance sont validés, la plupart des patients reconnaissent que le stress, les conditions sociales et les émotions ont un effet sur leur état physique. Cela ouvre la voie à traiter, à l'aide des stratégies axées sur les symptômes de la médecine comportementale, les facteurs psychologiques qui contribuent à la chronicité et à l'incapacité