Morten Berg Jensen

The NIG-S&ARCH Model: a fat tailed, stochastic, and autoregressive conditional heteroskedastic volatility model

This paper examines the capabilities of the Normal Inverse Gaussian distribu-tion as a model for stock returns. We extend the model of Barndorff-Nielsen (1997) to allow for a richer volatility structure and compare with the existing GARCH-type models. We conclude that the proposed model outperforms some of the most praised GARCH-M models. In particular, we make a big gain in modelling the skewness of equity returns.

Mechanisms of change in cognitive behaviour therapy for panic disorder: The role of panic self-efficacy and catastrophic misinterpretations

The efficacy of cognitive behavioural therapy (CBT) for panic disorder with or without agoraphobia (PD) is well-established; however, little is known about the underlying change processes of clinical improvement during therapy. According to cognitive theories, CBT for PD primarily works by changing catastrophic misinterpretations of bodily symptoms and panic attacks. However, panic self-efficacy, i.e. the perceived ability to cope with panic attacks, has also been suggested as an important change mechanism in CBT for PD. The aim of the study was to investigate if change in catastrophic misinterpretations and panic self-efficacy mediated change in the level of anxiety during the course of thirteen sessions of group CBT for PD. Forty-five participants completed weekly self-report measures of the possible cognitive mediators and the level of anxiety throughout therapy. The results indicated that within-person change in panic self-efficacy in one session, but not in catastrophic misinterpretations, predicted within-person level of anxiety symptoms the following week. However, in a reversed analysis, prior change in level of anxiety symptoms also predicted change in panic self-efficacy the following session. These results support panic self-efficacy as a mediator of change in CBT for PD, although a reciprocal causal relationship between panic self-efficacy and level of anxiety seems to be implied.

Emotion Differentiation and Emotion Regulation in High and Low Socially Anxious Individuals: An Experience-Sampling Study

AbstractThe present study explored when and how emotional difficulties and poor quality of life arise in the everyday lives of socially anxious individuals. 264 freshmen-year college students completed an online survey for 11 consecutive days. Comparing individuals high (HSA) and low in social anxiety, results revealed that irrespective of daily positive emotion differentiation ability, HSAs engaged daily emotion suppression strategies, pointing to inflexible emotion regulation. Furthermore, HSAs with poor daily negative emotion differentiation used the least daily cognitive reappraisal. Finally, both expressive suppression and cognitive reappraisal showed group-specific effects on daily positive affect. Daily expressive suppression was more strongly associated with diminished daily positive affect in HSAs, and HSAs benefited less in terms of daily positive affect from daily use of cognitive reappraisal. Based on these findings, emotion differentiation ability and emotion regulation appear relevant clinical targets for individuals with social anxiety disorder.

INNOVATIVE BRAND COMMUNITY MEMBERS AND THEIR WILLINGNESS TO SHARE IDEAS WITH COMPANIES

With the aim of contributing to the existing knowledge of brand community members and their willingness to share ideas, we investigate whether and how brand community innovators’ (i) lead user characteristics, (ii) brand community identification, (iii) brand knowledge, (iv) brand loyalty and (v) preferences regarding the brand owner’s interference in community activities influence their willingness to share their ideas with the company. In contrast to earlier studies, which inquired into brand community members’ intentions to share their ideas [see Fuller, J, K Matzler and M Hoppe (2008). Brand community members as a source of innovation. Journal of Product Innovation Management, 25, 608–619], we studied members who had already innovated and were actively involved in innovation processes.Using a survey of the Adult Fans of Lego (AFOL) community, we found that brand community members’ willingness to share their ideas is positively related to the ahead of the trend (AT) dimension of lead user characteristics, brand community identification and brand loyalty. Interference by the company in community activities also plays a role. Surprisingly, the brand community innovators perceive this role oppositely to what prior research on firm-hosted and open-source communities suggests. This study extends our knowledge of brand communities by demonstrating how brand community innovators’ interpersonal contexts, personal traits and brand perceptions may promote or demote willingness to share.

Unannounced versus Announced Hospital Surveys: A Nationwide Cluster-Randomized Controlled Trial

Abstract Objective To evaluate the effectiveness of unannounced versus announced surveys in detecting non-compliance with accreditation standards in public hospitals. Design A nationwide cluster-randomized controlled trial. Setting and participants All public hospitals in Denmark were invited. Twenty-three hospitals (77%) (3 university hospitals, 5 psychiatric hospitals and 15 general hospitals) agreed to participate. Intervention Twelve hospitals were randomized to receive unannounced surveys (intervention group) and eleven hospitals to receive announced surveys (control group). We hypothesized that the hospitals receiving the unannounced surveys would reveal a higher degree of non-compliance with accreditation standards than the hospitals receiving announced surveys. Nine surveyors trained and employed by the Danish Institute for Quality and Accreditation in Healthcare (IKAS) were randomized into teams and conducted all surveys. Main outcome measure The outcome was the surveyors’ assessment of the hospitals’ level of compliance with 113 performance indicators—an abbreviated set of the Danish Healthcare Quality Programme (DDKM) version 2, covering organizational standards, patient pathway standards and patient safety standards. Compliance with performance indicators was analyzed using binomial regression analysis with bootstrapped robust standard errors. Results In all, 16 202 measurements were acceptable for data analysis. The risk of observing non-compliance with performance indicators for the intervention group compared with the control group was statistically insignificant (risk difference (RD) = −0.6 percentage points [−2.51–1.31], P = 0.54). A converged analysis of the six patient safety critical standards, requiring 100% compliance to gain accreditation status revealed no statistically significant difference (RD = −0.78 percentage points [−4.01–2.44], P = 0.99). Conclusions Unannounced hospital surveys were not more effective than announced surveys in detecting quality problems in Danish hospitals. Trial Registration number ClinicalTrials.gov NCT02348567, https://clinicaltrials.gov/ct2/show/NCT02348567?term=NCT02348567.

ATTITUDES AND BARRIERS TOWARD MINI-HTA IN THE DANISH MUNICIPALITIES

BACKGROUND In 2008 the Danish National Board of Health launched an information campaign aimed at introducing mini-HTA as a management and decision support tool for the municipalities. Today (January 2012), mini-HTA is still not used regularly in the municipalities. AIM The aim of this study was to evaluate the latent attitudes toward mini-HTA among ninety-three participants in five voluntary workshops on mini-HTA held in the period of May 2008 to February 2009. METHODS In a questionnaire including three open questions respondents were asked to state their perception of what mini-HTA could be used for in the municipality, the main barriers for using mini-HTA, and what could make it easier to implement mini-HTA. Answers were analyzed qualitatively and quantitatively using binary coding and statistical examination of patterns in form of R-factor analysis. RESULTS The four significant latent attitudes were a general acceptance of HTA-principles, a derived need for a political/managerial decision to use mini-HTA in the municipality, worries about barriers in the medium run, and worries about barriers in the short run. CONCLUSIONS A national information campaign to support the uptake of mini-HTA in local health-care institutions was insufficient in the Danish municipalities and should have been supplemented with a strategy to secure local political/managerial willingness to use mini-HTA and the removal of short- and medium-term barriers. The implementation of local HTA should not just be seen as a question of how to increase the use of evidence in decision-making, but as a matter of reforming local decision processes.

Health-related quality-of-life in patients after elective surgery for abdominal aortic aneurysm

Abstract Purpose: The purpose of this study was to describe the health-related quality-of-life (QoL) in patients after elective surgery for abdominal aortic aneurysm (AAA) compared to a normal population and to study the association between QoL and number of years since surgery. Methods: All Danish men who underwent elective surgery for AAA at the age of 65 or more in the period from 1989–2007 in Denmark were invited to participate in the survey. Of 722 patients, 375 were alive and 328 (87%) responded. The instruments EQ-5D (European Quality of life), EQ-VAS and SF-12 (Short Form Health Survey) were applied for measuring health-related QoL. Multiple regression analysis was used to study the association between QoL and number of years since AAA surgery. Results: A significantly poorer QoL was found in patients having had AAA surgery compared to the normal population as measured with the SF-12 and the EQ-VAS, but not with EQ-5D. A negative association between QoL and years following surgery was found with EQ-VAS and SF-12 (PCS), but not with the other instruments. Discussion: Factors such as selection bias because of mortality and non-response may have resulted in an over-estimate of the QoL in patients having had AAA surgery, thus the difference in QoL compared to the normal population was probably under-estimated. The cross-section design was inefficient for the study of the association between QoL and years since surgery, and EQ-5D may be an insensitive instrument for measuring QoL in AAA patients after surgery. Limitations: The main limitation of the study was the cross-sectional design. Males with a higher risk of death were under-represented in the sample. Conclusion: A poorer quality-of-life was found in patients having had elective AAA surgery compared to the normal population.

Multi-informant path models of the influence of psychosocial and treatment-related variables on adherence and metabolic control in adolescents with type 1 diabetes mellitus

Background We assessed the associations between metabolic control and adherence and a broad range of adolescent and family characteristics (e.g., gender, family structure), treatment-related variables (e.g., disease duration, treatment modality), and psychosocial factors (e.g., symptoms of depression and anxiety, parental support, self-efficacy) in a nationwide study of Danish adolescents (age 12–17 years) with type 1 diabetes mellitus (T1DM). Methods Sixty-four percent of invited families participated by completing a survey and providing a blood sample. Two path models of associations between generic and diabetes-related family factors, adolescent self-efficacy, emotional difficulties, and metabolic control and adherence were tested, one for adolescents and one for caregivers. Demographic variables were included as covariates. Results Both path models demonstrated a satisfying model fit. In both models, metabolic control was associated with adherence, age, and T1DM duration. In the adolescent model, metabolic control was also related to treatment modality, single-parent household, caregiver non-support, and anxiety, whereas in the caregiver model metabolic control was associated with family conflict and caregiver support. In both models, adherence was related to age, duration, treatment modality, family conflict, caregiver support, family functioning, and emotional difficulties of the adolescent. In the adolescent model, adherence was also related to adolescent self-efficacy, whereas in the caregiver model adherence was associated with adolescent gender and caregiver non-support and support. Adolescent self-efficacy, emotional well-being, and difficulties related to adolescent/caregiver interaction appeared to be particularly important, as indicated by their stronger association with adherence and/or metabolic control. Conclusion The results highlight the value of applying a multi-informant approach to address the psychosocial well-being of adolescents with diabetes in a large national sample. Self-efficacy, emotional, and family-related difficulties are important aspects to address in both clinical care and future research regarding adolescents with T1DM.

Analysis of SMEs partner proximity preferences for process innovation

This paper explores small and medium enterprises’ (SMEs) proximity preferences when selecting partners for collaborative process innovation. Drawing on a survey of 362 Danish SMEs, we address four partner proximity characteristics: geographic, cognitive, organizational, and social. The results show that SMEs prioritize geographic openness over regional clustering. Furthermore, to simultaneously facilitate collaboration and ensure innovation, firms tend to collaborate with partners that are characterized by cognitive similarity at a technological level and knowledge distance at a market level. Technological proximity is also found to be more relevant than social proximity when it comes to bridging the potential geographic and market distance between the collaborative partners. Finally, the results indicate that the tendency of organizational proximity to facilitate informal interactions with partners enhances process innovation only at two of four process innovation levels. Thus, the results highlight the fact that the value of partner proximity characteristics change with the level of process innovation considered.

Unannounced or announced periodic hospital surveys: a study protocol for a nationwide cluster-randomized controlled trial

License. The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. Permissions beyond the scope of the License are administered by Dove Medical Press Limited. Information on how to request permission may be found at: http://www.dovepress.com/permissions.php Comparative Effectiveness Research 2015:5 57–63 Comparative Effectiveness Research Dovepress