bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Winner’s Curse in Dynamic Forecasting of Auction Data: Empirical Evidence from eBay
Authors: Haruvy Ernan , Nia Meisam Hejazi , Özer Özalp , Şimşek A. Serdar 
Published: March 2023

Problem definition: Dynamic forecasting models in auctions have fallen short on two dimensions: (i) the lack of an equilibrium model for final bids and (ii) the lack of a winner’s curse (i.e., a tendency to overpay conditional on winning the auction) adjustment to allow bidders to account for a common value component in the auction item. In this paper, we develop a methodology to accurately predict equilibrium stage bids from the initial bidding dynamics and quantify the impact of the winner’s curse. This methodology allows us to conduct policy simulations to optimize auction design parameters. Methodology/Results: Dynamic auctions typically have a stage of high exploratory activity, followed by an inactivity period, and then an equilibrium stage of last-minute bids with sharp jumps. With a Kalman filter approach, we use exploratory stage bids to predict an auction item’s valuation distribution. We feed this prediction into an equilibrium model and apply item-specific adjustments for winner’s curse, bidder heterogeneity, and inactivity period. We use the resulting equilibrium model to predict the equilibrium stage bids. Our methodology improves the forecast of equilibrium stage bids by 11.33%, on average, compared with a state-of-the-art benchmark. This improvement is even higher (18.99%) for common value auctions. We also find that (i) significantly more (respectively, fewer) bidders internalize the winner’s curse in common value (respectively, private value) auctions; (ii) bidders in common value auctions decrease their bids by 6.03% because of the winner’s curse; and (iii) the inactivity period has a lesser impact on the equilibrium stage bids in private value auctions. Managerial implications: Our proposed methodology is intended to facilitate the need in academia and practice for real-time bid predictions that encompass different levels of the common value component in auctions. Using our methodology, auction platforms can support their choice of minimum bid increment policies and decide how to allocate resources across different auctions to mitigate the adverse effects of the winner’s curse. Supplemental Material: The online appendix is available at https://doi.org/10.1287/msom.2022.1165 .
Ten Years of Management of Esophageal Atresia in Benin: State of the Art, Experiences and Needs for Families of Children with Stoma
Authors: Samuel Boris Gogan Mahunakpon Vihotogbe Leon , Romeo Houegban Amoussou Sedjro Clotaire , Metchihoungbe Codjo Serge , Khen-Dunlop Naziha , Sergine Dossou Modoukpe Grace Immaculee , Covi Aldrico Pautin , Fiogbe Michel Armand , Gbenou Antoine Seraphin 
Published: March 2023

Background/Purpose: Esophageal atresia (EA) is a congenital defect in the thoracic esophagus associated or not with a tracheoesophageal fistula (TEF). It is associated with high mortality in low-income countries such as Burkina Faso, Madagascar and Ghana. The purpose of this study was to present the recent management of newborns with EA/TEF in Benin and to identify the needs of families whose children have survived.
Method: Over a period of 10 years, 54 newborns with EA/TEF operated on in the 2 largest university hospitals in Benin were included. Two groups were identified. Group A (n=33) included newborns in whom a primary repair had been performed. Group B (n=21) involved newborns who underwent staged repair. Staged repair involved cervical oesophagostomy + gastrostomy (n= 7) or upper oesophageal pouch suction + gastrostomy (n=2) or cervical esophagostomy + stoma of the lower esophageal pouch (n=12). Ten parents from group B were interviewed for the needs survey. The significance level was defined as p < 0.05.
Results: There were 31 male newborns. The median for gestational age was 37 gestational weeks (range: 35 - 38). Polyhydramnios was observed in 4 cases. The mean birth weight was 2365 g. (range: 1000 g - 3500 g). The mean age at diagnosis was 3.48 days (range: 24 hours - 19 days). Surgery was performed at day 5 on average with extremes from day 2 to day 17. The surgery lasted an average of 2h12 min and the overall mortality rate was 74.07%. Mortality rate in group A was 100% and 33.33% in group B. There was a strong statistically significant difference in survival between the two groups. (p=19.10-8). Sepsis was the most common cause of death. Stress, fear and anxiety of losing the child were the difficulties frequently encountered at bedtime and every day. Four parents had to stop their activities to be available to take care of their child. All the parents had expressed the need for psychological support.
Conclusion: Pending an improvement of the technical platform, staged repair remains an essential option for the survival of patients. The creation of a framework for discussion with families authorizing social actions and quality medical support is desired.
The inverse Horn problem
Authors: Queiró João Filipe , Santana Ana Paula 
Published: March 2023

Alfred Horn's conjecture on eigenvalues of sums of Hermitian matrices was proved more than 20 years ago. In this note, the problem is raised of, given an $n$-tuple $\gamma$ in the solution polytope, constructing Hermitian matrices with the required spectra such that their sum has eigenvalues $\gamma$.
Periprosthetic joint infection in patients with multiple arthroplasties
Authors: Sangaletti Rudy , Zanna Luigi , Akkaya Mustafa , Sandiford Nemandra , Ekhtiari Seper , Gehrke Thorsten , Citak Mustafa 
Published: March 2023

AimsDespite numerous studies focusing on periprosthetic joint infections (PJIs), there are no robust data on the risk factors and timing of metachronous infections. Metachronous PJIs are PJIs that can arise in the same or other artificial joints after a period of time, in patients who have previously had PJI.MethodsBetween January 2010 and December 2018, 661 patients with multiple joint prostheses in situ were treated for PJI at our institution. Of these, 73 patients (11%) developed a metachronous PJI (periprosthetic infection in patients who have previously had PJI in another joint, after a lag period) after a mean time interval of 49.5 months (SD 30.24; 7 to 82.9). To identify patient-related risk factors for a metachronous PJI, the following parameters were analyzed: sex; age; BMI; and pre-existing comorbidity. Metachronous infections were divided into three groups: Group 1, metachronous infections in ipsilateral joints; Group 2, metachronous infections of the contralateral lower limb; and Group 3, metachronous infections of the lower and upper limb.ResultsWe identified a total of 73 metachronous PJIs: 32 PJIs in Group 1, 38 in Group 2, and one in Group 3. The rate of metachronous infection was 11% (73 out 661 cases) at a mean of four years following first infection. Diabetes mellitus incidence was found significantly more frequently in the metachronous infection group than in non-metachronous infection group. The rate of infection in Group 1 (21.1%) was significantly higher (p = 0.049) compared to Groups 2 (6.2%) and 3 (3%). The time interval of metachronous infection development was shorter in adjacent joint infections. Concordance between the bacterium of the first PJI and that of the metachronous PJI in Group 1 (21/34) was significantly higher than Group 2 (13/38; p = 0.001).ConclusionThe findings of this study suggest that metachronous PJI occurs in more than one in ten patients with an index PJI. Female patients, diabetic patients, and patients with a polymicrobial index PJI are at significantly higher risk for developing a metachronous PJI. Furthermore, metachronous PJIs are significantly more likely to occur in an adjacent joint (e.g. ipsilateral hip and knee) as opposed to a more remote site (i.e. contralateral or upper vs lower limb). Additionally, adjacent joint PJIs occur significantly earlier and are more likely to be caused by the same bacteria as the index PJI.Cite this article: Bone Joint J 2023;105-B(3):294–300.
How long do ankle arthroplasties last?
Authors: Jennison Toby , Ukoumunne Obi , Lamb Sallie , Sharpe Ian , Goldberg Andrew J. 
Published: March 2023

AimsDespite the increasing numbers of ankle arthroplasties, there are limited studies on their survival and comparisons between different implants. The primary aim of this study was to determine the failure rates of primary ankle arthroplasties commonly used in the UK.MethodsA data linkage study combined National Joint Registry (NJR) data and NHS Digital data. The primary outcome of failure was defined as the removal or exchange of any components of the implanted device. Life tables and Kaplan-Meier survival charts were used to illustrate survivorship. Cox proportional hazards regression models were fitted to compare failure rates between 1 April 2010 and 31 December 2018.ResultsOverall, 5,562 primary ankle arthroplasties were recorded in the NJR. Linked data show a one-year survivorship of 98.8% (95% confidence interval (CI) 98.4% to 99.0%), five-year survival in 2,725 patients of 90.2% (95% CI 89.2% to 91.1%), and ten-year survival in 199 patients of 86.2% (95% CI 84.6% to 87.6%). The five-year survival for fixed-bearing implants was 94.3% (95% CI 91.3% to 96.3%) compared to 89.4% (95% CI 88.3% to 90.4%) for mobile-bearing implants. A Cox regression model for all implants with over 100 implantations using the implant with the best survivorship (Infinity) as the reference, only the STAR (hazard ratio (HR) 1.60 (95% CI 0.87 to 2.96)) and INBONE (HR 0.38 (95% CI 0.05 to 2.84)) did not demonstrate worse survival at three and five years.ConclusionAnkle arthroplasties in the UK have a five-year survival rate of 90.2%, which is lower than recorded on the NJR, because we have shown that approximately one-third of ankle arthroplasty failures are not reported to the NJR. There are statistically significant differences in survival between different implants. Fixed-bearing implants appear to demonstrate higher survivorship than mobile-bearing implants.Cite this article: Bone Joint J 2023;105-B(3):301–306.
An assessment of the impact of developmental dysplasia of the hip on patients’ wellbeing
Authors: Franco Helena , Saxby Nathan , Corlew Daniel S. , Perry Daniel C. , Pigeolet Manon 
Published: March 2023

AimsWithin healthcare, several measures are used to quantify and compare the severity of health conditions. Two common measures are disability weight (DW), a context-independent value representing severity of a health state, and utility weight (UW), a context-dependent measure of health-related quality of life. Neither of these measures have previously been determined for developmental dysplasia of the hip (DDH). The aim of this study is to determine the DW and country-specific UWs for DDH.MethodsA survey was created using three different methods to estimate the DW: a preference ranking exercise, time trade-off exercise, and visual analogue scale (VAS). Participants were fully licensed orthopaedic surgeons who were contacted through national and international orthopaedic organizations. A global DW was calculated using a random effects model through an inverse-variance approach. A UW was calculated for each country as one minus the country-specific DW composed of the time trade-off exercise and VAS.ResultsOver a four-month period, 181 surgeons participated in the survey, with 116 surgeons included in the final analysis. The global DW calculated to be 0.18 (0.11 to 0.24), and the country-specific UWs ranged from 0.26 to 0.89.ConclusionThis is the first time that a global disability weight and country-specific utility weights have been estimated for DDH, which should assist in economic evaluations and the development of health policy. The methodology may be applied to other orthopaedic conditions.Cite this article: Bone Jt Open 2023;4(3):120–128.
Evaluating task shifting to the clinical technologist in Dutch healthcare: A mixed methods study
Authors: de Haan Maarten , van Eijk-Hustings Yvonne , Bessems-Beks Monique , De Bruijn-Geraets Daisy , Dirksen Carmen , Vrijhoef Hubertus 
Published: March 2023

Background
Expected rise in the demand for healthcare and a dropping supply of healthcare professionals, has generated an increased interest in the most effective deployment of healthcare professionals. Consequently, task shifting has become a common strategy to redistribute tasks between established professional groups, however, little is known about the effects of shifting tasks to emerging professional groups. The aim of this study was to evaluate a legal amendment to facilitate task shifting to an emerging profession in Dutch healthcare: Clinical Technologists (CTs). CTs were introduced and provided an Extended Scope of Practice (ESP) to perform nine ‘reserved procedures’ independently.

Methods
A concurrent multi-phase mixed methods study was used to evaluate whether a legal amendment to facilitate task shifting to CTs was effective and efficient.

Results
The results show that CTs use their ESP frequently to perform five categories of reserved procedures independently and suggest that the ESP increased the efficiency of care delivery for those procedures. Additionally, the findings highlight that task shifting was influenced by the setting in which CTs worked, time allotted to patient-contact as well as external factors (e.g., financing).

Conclusions
This study provides tentative lessons for policymakers on how task shifting to emerging professional groups can be improved. Providing a legal amendment to facilitate task shifting to CTs seems to be effective and efficient. However, it also poses multiple challenges. While established professional groups can face similar challenges, it is likely that these are exacerbated for emerging professional groups, particularly when shifting tasks occurs horizontally.
Proposal for a shared definition of « primary healthcare » by health professionals: A national cross-sectional survey
Authors: Prade Michel , Rousseau Anne , Saint-Lary Olivier , Baumann Sophie , Devillers Louise , Courtin Arnaud , Gautier Sylvain 
Published: March 2023

IntroductionForty years passed between the two most important definitions of primary health care from Alma Alta Conference in 1978 to WHO’s definition in 2018. Since then, reforms of healthcare systems, changes in ambulatory sector and COVID 19, have created a need for reinterpretations and redefinition of primary healthcare. The primary objective of the study was to precise the definitions and the representations of primary healthcare by healthcare professionals.MethodsWe conducted a descriptive cross-sectional study using a web-based anonymized questionnaire including opened-ended and closed-ended questions but also “real-life” case-vignettes to assess participant’s perception of primary healthcare, from September to December 2020. Five case-vignette, describing situations involving a specific primary health care professional in a particular place for a determined task were selected, before the study, by test/retest method.ResultsA total of 585 healthcare practitioners were included in the study, 29% were general practitioners and 32% were midwives. Amongst proposed healthcare professions, general practitioners (97.6%), nurses (85.3%), midwives (85.2%) and pharmacists (79.3%) were those most associated with primary healthcare. The functions most associated with primary healthcare, with over 90% of approval were “prevention, screening”, “education to good health”, “orientation in health system”. Two case-vignettes strongly emerged as describing a situation of primary healthcare: Midwife/Hospital/Pregnancy (74%) and Pharmacist/Pharmacy/Flu shot (90%). The profession and the modality of practice of the responders lead to diverging answers regarding their primary healthcare representations.ConclusionsPrimary healthcare is an ever-evolving part of the healthcare system, as is its definition. This study explored the perception of primary healthcare by French healthcare practitioners in two complementary ways: oriented way for the important functions and more practical way with the case-vignettes. Understanding their differences of representation, according to their profession and practice offered the authors a first step to a shared and operational version of the primary healthcare definition.
Psychiatric symptomatology in skin-restricted lupus patients without axis I psychiatric disorders: A post-hoc analysis
Authors: Rondepierre Fabien , Tauveron-Jalenques Urbain , Valette Solène , Mulliez Aurélien , D’Incan Michel , Lauron Sophie , Jalenques Isabelle 
Published: March 2023

Background
Skin-restricted lupus is a chronic inflammatory disease associated with high rates of depression and anxiety disorders. Patients without psychiatric disorders can experience anxiety and depressive symptoms at a subclinical level, which could be risk factors for progression towards psychiatric disorders. It was decided, therefore, to investigate the presence of specific symptoms in skin-restricted lupus patients without axis I psychiatric disorders and their impact on the occurrence of axis I psychiatric disorders during the study follow-up.

Methods
Longitudinal data of 38 patients and 76 matched controls without active axis I psychiatric disorders from the LuPsy cohort were used. Depressive, neurovegetative, psychic and somatic anxiety symptom scores were established from the Montgomery-Asberg Depression Rating Scale (MADRS) and the Hamilton Anxiety Rating scale (HAMA).

Results
None of the participants had any current active axis I psychiatric disorders but the patients had personality disorders more frequently and had received more past psychotropic treatments than the controls. They also had higher MADRS and HAMA scores than the controls, in particular neurovegetative, psychic anxiety and somatic symptoms scores. No dermatological factor tested was associated with these scores, whereas being a lupus patient was associated with higher neurovegetative and somatic symptoms scores, having a current personality disorder with higher depressive and neurovegetative scores and receiving more past psychotropic treatments with psychic anxiety and somatic symptoms scores. The occurrence of psychiatric disorders during the study follow-up was associated with an elevated psychic anxiety score at baseline and past psychotropic treatment but not with history of psychiatric disorder.

Limitations
The LuPsy cohort included a large number of patients with axis I psychiatric disorders, the sample without axis I psychiatric disorders is therefore limited.

Conclusions
We observed numerous psychiatric symptoms among the skin-restricted lupus patients. They should therefore receive special attention in the management of their subclinical symptoms before they progress towards full psychiatric disorders.
Participating in a parenting intervention in prison, perceptions from incarcerated fathers and mothers—A convergent mixed-methods study
Authors: Norman Åsa , Enebrink Pia 
Published: March 2023

BackgroundChildren of incarcerated parents run a high risk of ill-health and future delinquency, whereas positive parenting can support children’s healthy development. The For Our Children’s Sake (FOCS) parenting intervention for parents in prison was evaluated as a controlled trial during 2019–2021 within The Swedish Prison and Probation Service (SPPS). This study reports on the process evaluation and aimed to describe how parents perceived their participation and aspects that influenced implementation of the FOCS intervention.MethodsThis convergent mixed-methods study (QUAL + quan) included qualitative interview data after participation in the FOCS intervention group (12 parents), and quantitative questionnaire data from intervention and control groups (46 parents). Qualitative data were analysed using inductive qualitative content analysis and quantitative data using descriptive and non-parametric statistics.ResultsAn integrated synthesis of the qualitative and quantitative results showed three joint concepts that provided an extended understanding ofthe importance of a child and parent focused intervention available to parents in prison, where FOCS was perceived as the only place where inmates could openly reflect, and express sensitive feelings and thoughts related to the children and being a parent. Also, that the SPPS as an organisation entailspartly unsupportive organisational norms with irregular individual staff engagement, which made FOCS invisible in prisons, andthe importance of engagement and motivation from all participants and group leaders in the groupwas essential for a successful FOCS group.ConclusionThis study showed that availability of a child and parent focused intervention in prison is perceived as very important, and at the same time dependent on a trustful relationship in the group to be rewarding to the participants, where organisational norms within the SPSS need amendments for successful implementation of FOCS. These findings can guide further implementation of similar interventions in prison.
Predictors of death among severe COVID-19 patients admitted in Hawassa City, Sidama, Southern Ethiopia: Unmatched case-control study
Authors: Misganaw Samuel , Eshetu Betelhem , Adane Adugnaw , Solomon Tarekegn 
Published: March 2023

IntroductionSince COVID-19 was announced as a worldwide pandemic, the world has been struggling with this disease. In Ethiopia, there is some information on the epidemiological characteristics of the disease and treatment outcomes of COVID-19 patients. But, there is limited evidence related to predictors of death in COVID-19 patients.ObjectiveTo assess the predictor of death among severely ill COVID-19 patients admitted in Hawassa city COVID-19 treatment centers.MethodsAn institution-based unmatched case-control study was conducted at Hawassa city COVID-19 treatment centers from May 2021 to June 2021. All severe COVID-19-related deaths from May 2020 to May 2021 were included in the case group whereas randomly selected discharged severe COVID-19 patients were included in the control group. Extracted information was entered into Epi-data 4.6 and exported to SPSS 25 for analysis. Multivariable binary logistic regression was run to assess predictors. The result was presented as an adjusted odds ratio with a 95% confidence interval. Variables with a 95% confidence interval which not included one were considered statistically significant.ResultA total of 372 (124 cases and 248 controls) patients were included in the study. Multivariable analysis revealed age ≥ 65 years (AOR = 2.62, 95% CI = 1.33–5.14), having shortness of breath (AOR = 1.87, 95% CI = 1.02–3.44), fatigue (AOR 1.78, 95% CI = 1.09–2.90), altered consciousness (AOR 3.02, 95% CI = 1.40, 6.49), diabetic Mellitus (AOR = 2.79, 95% CI = 1.16–6.73), chronic cerebrovascular disease (AOR = 2.1, 95% CI = 1.23, 3.88) were found to be predictors of death.ConclusionOlder age, shortness of breath, fatigue, altered consciousness, and comorbidity were predictors of death in Severe COVID-19 patients.
Les archives d’architecture en France, un patrimoine récent et fragile
Authors: Peyceré David 
Published: March 2023

Les archives d’architecture, et plus spécialement celles des architectes, ont été identifiées et collectées en France à partir des années 1980, à partir d’une prise de conscience rapide dans les années 1970 sous l’effet conjugué de plusieurs facteurs – crise de l’enseignement de l’architecture, institutionnalisation de la recherche sur le patrimoine, démolitions polémiques. L’Institut français d’architecture est devenu l’acteur majeur dans le domaine, avec son Centre d’archives d’architecture du xxe siècle doté d’un lieu propre en 1989 ; il a, pendant une ou deux décennies, fédéré les actions d’associations d’archives d’architecture en province. Par son poids croissant, la collection est ensuite devenue plus difficile à gérer jusqu’à un déménagement récent (2021). L’article analyse les causes initiales de la prise en compte des archives d’architecture en France, les étapes de l’existence du Centre d’archives, et les défis qui sont aujourd’hui les siens et ceux de toute la recherche en histoire de l’architecture.