管理学最新文献

Objective: This study aims to develop machine learning models that provide both accurate and equitable predictions of 2-year stroke risk for patients with atrial fibrillation across diverse racial groups.

Materials and methods: Our study utilized structured electronic health records (EHR) data from the All of Us Research Program. Machine learning models (LightGBM) were utilized to capture the relations between stroke risks and the predictors used by the widely recognized CHADS2 and CHA2DS2-VASc scores. We mitigated the racial disparity by creating a representative tuning set, customizing tuning criteria, and setting binary thresholds separately for subgroups. We constructed a hold-out test set that not only supports temporal validation but also includes a larger proportion of Black/African Americans for fairness validation.

Results: Compared to the original CHADS2 and CHA2DS2-VASc scores, significant improvements were achieved by modeling their predictors using machine learning models (Area Under the Receiver Operating Characteristic curve from near 0.70 to above 0.80). Furthermore, applying our disparity mitigation strategies can effectively enhance model fairness compared to the conventional cross-validation approach.

Discussion: Modeling CHADS2 and CHA2DS2-VASc risk factors with LightGBM and our disparity mitigation strategies achieved decent discriminative performance and excellent fairness performance. In addition, this approach can provide a complete interpretation of each predictor. These highlight its potential utility in clinical practice.

Conclusions: Our research presents a practical example of addressing clinical challenges through the All of Us Research Program data. The disparity mitigation framework we proposed is adaptable across various models and data modalities, demonstrating broad potential in clinical informatics.

Persons with disabilities (PwDs) face a disproportionately high risk due to their physical or mental limitations and socioeconomic barriers during emergencies. To better understand and empower PwDs for disaster preparedness, this study used an updated national representative survey (2021 Federal Emergency Management Agency National Household Survey) from the United States to examine the differences between PwDs and their counterparts concerning disaster preparedness with the guidance of the protection motivation theory. The results of the Tobit regression models indicated that being disabled was negatively correlated with the level of preparedness. Furthermore, disability status significantly and negatively modified the relationship between risk perception and disaster preparedness. Likewise, self-efficacy was less strongly correlated with preparedness activities if people self-reported themselves as having a disability. Moreover, for people with disabilities, their beliefs about the effectiveness of preventive behaviours (response efficacy) predicted decreased adoption of preparedness measures. Promoting disaster risk reduction education, strengthening self-efficacy and developing more inclusive and targeted intervention strategies for PwDs can be used to improve their preparedness degree and capacity for disaster prevention.

This study examined why consumers who typically pay electronically at points of sale still carry cash and explained the inertia of demand for cash by considering the additional (perceived by consumers) characteristics of cash. The research was motivated by the growing discussion on why cash, despite the increasing importance of e-payments, remains a significant part of the demand for money. The study focused on psychological factors and consumers' perceptions of certain features of cash, which make it an attractive additional option for precautionary reasons, and therefore, explored beyond the typical discussion of money as a means of payment. The structural equation modeling based on data collected as part of a survey of Polish consumers was used to verify the hypotheses. It was revealed that cash becomes a reserve solution for consumers, which is kept “just in case” to expand the scope of personal freedom and flexibility in making payments and protect against various potential restrictions and threats related to e-payments. Consumers' holding of cash as an additional option depends on three key factors: attitude toward cash, particularly the flexibility it offers, unusual purchasing situations, and perceived card or mobile payment risk, considered as a moderator. In the debate on the future of cash, the study supports the position that cash has a place in the modern payment system, although it plays a different role. Cash is a supportive backup solution. Eliminating cash significantly reduces consumer welfare.

Small and medium enterprises (SMEs) are often resource-constrained and motivated by necessity or opportunity. They play an essential role in national economies due to their contributions to employment, human capital development, knowledge spillovers, and social mobility in maintaining diverse entrepreneurial ecosystems. Government support policies (GSP), both financial and nonfinancial, can directly impact SME performance or indirectly by developing an entrepreneurial orientation (EO). Few studies have investigated the important question of how GSP simultaneously may impact both the EO and the performance of an SME. Thus, this paper aims to identify the current understanding of how different forms of GSPs relate to and impact the EO and the performance of SMEs. A systematic literature review was conducted using the PRISMA methodology to synthesize this understanding, resulting in 65 relevant articles from the ABI/INFORM, ScienceDirect, Scopus and Web of Science databases. The relationships between the constructs were analyzed using thematic and semantic analyses, employing computer-assisted data analysis software (NVivo 12 and Leximancer 4.5). This resulted in the categorization of GSPs as direct and indirect support policies, with financial and nonfinancial-subcategories, and depicted their pathways of influence on SMEs’ EO and performance. The study found that GSPs have four different pathways by which they can impact performance. Both direct and indirect policies have moderating effects that can magnify the impact of EO on performance. The review established that the direct effect of GSP on EO varies by sector, SME growth-intention, and type of GSP. Based on the findings, we recommend policymakers develop support policies tailored to SMEs’ specific sector and its intentions to enhance performance.

Purpose

Prior research has investigated the benefit of companies that engage in cause-related marketing initiatives. However, this prior research has not adequately examined cause-related marketing situations when brands raise awareness for a cause without contribution of tangible resources to the cause (i.e. awareness marketing); thus, the purpose of this paper is to introduce and test awareness marketing as a new type of cause-related marketing.

Design/methodology/approach

Through four experimental studies with different sample sources, the authors introduce and examine a new type of cause-related marketing (awareness marketing) as well as identify mediating explanatory mechanisms.

Findings

Awareness marketing produces similarly heightened purchase intentions to other types of cause-related marketing (e.g. financial donation) when compared to situations where cause-related marketing is not used. Awareness marketing can also lead to higher brand authenticity and brand originality perceptions in some situations when compared to cause-related marketing incorporating a financial donation component or when no cause-related marketing is used. Brand perceptions and consumers’ perceived self-brand connection mediate the relationship from cause-related marketing to purchase intentions.

Research limitations/implications

This research is limited by conducting studies in only experimental conditions and in one culture. Theoretical implications are provided to the literature on brand authenticity and self-brand connection. In doing so, the authors explain why awareness marketing is evaluated differently than other types of cause-related marketing or marketing without any cause reference.

Practical implications

Marketers would benefit from using awareness marketing (i.e. raising awareness for a cause without direct contribution to the cause) as a lower investment alternative to traditional cause-related marketing efforts.

Originality/value

To the best of the authors’ knowledge, this is the first research to introduce awareness marketing as a new type of cause-related marketing and compare it to traditional types of cause-related marketing, thereby providing novel contributions as to how cause-related marketing can effectively increase purchase intentions without making a financial, product or other tangible contribution to a cause.

From 2008 to 2020, 180 of S&P 1500 have disclosed employee diversity targets. We conduct the first analysis of firms’ employee diversity targets and ask three research questions: (i) who announces diversity targets? (ii) do firms deliver on their diversity targets? (iii) what are the implications of disclosure of such targets for employee hiring and investors? We find that firms with a greater willingness (proxied by past ESG penalties, higher CEO-to-median employee pay ratio, more media coverage, and after #MeToo and Black Lives Matter movements) and ability (proxied by financial strength, a blue-collar heavy labor force, and gender and ethnic minorities on boards) to improve employee diversity are more likely to disclose diversity targets. Exploiting the Revelio dataset of 15,639 firm-years for 1,203 distinct firms from 2008 to 2020, we observe that firms that disclosed a diversity target have indeed hired more diverse employees, but such diversity levels had already increased substantially prior to the target disclosure. Firms with numerical, forward-looking, and rank-and-file employee-targeted goals are associated with greater employee diversity relative to firms that announce other types of diversity goals. Moreover, improved diversity performance does not appear to occur at the cost of employee quality, as measured by Revelio. Overall our results have practical implications for how investors and stakeholders might want to interpret corporate diversity targets.