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Two-phase R-744 ejectors are critical components enabling energy recovery in R-744 heat pump and refrigeration systems, but despite their simple geometry, the flow physics involve complex multiphase mixing phenomena that need to be well-quantified for component and overall system improvement. This study aims to report on multiphase mixture simulations for a specific two-phase R-744 ejector with supercritical inlet conditions at the motive inlet side.

Four different operating conditions, which have motive inlet pressure range of 90.1 bar–101.1 bar, are selected from an existing experimental data set. A two-phase thermodynamic equilibrium (TPTE) model is used, where the fluid properties are described by a thermodynamic look-up table.

The results show that the TPTE model overpredicts mass flow rates at the motive inlet, resulting in a relative error ranging from 15.6% to 21.7%. For the mass flow rate at the suction inlet, the relative errors are found less than 1.5% for three cases, while the last case has an error of 12.4%. The maximum deviation of the mass entrainment ratio is found to be 8.0% between the TPTE model and the experimental data. Ejector efficiency ranges from 25.4% to 28.0%. A higher pressure difference between the ejector outlet and the diverging nozzle exit provides greater pressure lift.

Based on the results, near future efforts will be to optimize estimation errors while enabling more detailed field analysis of pressure, density, temperature and enthalpy in the computational domain.

The authors have two main original contributions: 1) the presented thermodynamic look-up table is unique and provides unique computation for the real-scale ejector domain. It was created by the authors and has not been applied before as far as we know. 2) To the best of the authors’ knowledge, this study is the first study that applies the STAR-CCM+ multiphase mixture model for R-744 mixture phenomena in heat pumps and refrigeration systems.

Private retail and brand-driven sustainable procurement standards are influencing global agri-food markets, shifting trade and export priorities and reshaping food supply chains. Using the case of Australian beef, the authors construct and evaluate three procurement activity “portfolios” and evaluate how these activity sets pull towards or against diverse organisational goals and/or science-based sustainability objectives.

A review of the academic and practitioner literature identified three key pillars for sustainable Australian beef procurement: animal welfare, environmental management and climate change (i.e. emissions). A subset of sustainable beef production activities (n = 100) was identified through this review plus semi-structured interviews with Australian beef retailers and industry bodies. This activity set was filtered (n = 40) and scored by a panel of science experts via a series of workshops and an additional survey. Using these data, the authors use a k-means cluster analysis (k = 3) to consider the strong or weak contributions of each activity portfolio towards typical sustainable beef goals.

A portfolio-based view of sustainable procurement puts the trade-offs between activities and the need for clear sustainability prioritisation into sharp focus. The authors find that individual strategies may be singularly more or less impactful, complex or popular, but when combined as a suite of activities enacted towards a particular goal or set of goals, essential for success. The authors find that obtaining balance across sustainable beef pillars versus within specific pillars can narrow the optimal set of activities that can succeed against multiple sustainability goals.

For procurement managers, the balance between clear focus and multidimensional progress is a difficult challenge. It requires the bold identification and articulation of an organisation’s interlocking corporate, industry or environmental objectives and flexibility on the strategies, tools and resources required. The authors posit that shifting away from a focus on rigid metrics may be useful in breaking the impasse on meaningful action.

Using a set of known activities and strategies that a procurement manager might draw from in operationalising sustainability goals, the authors cluster activities into three discrete activity portfolios. Each portfolio requires differing levels of effort, implementation complexity and potential for within-pillar and cross-pillar impact (i.e. co-benefits). Assessing the evidence and potential for cross-pillar impacts of individual strategies is a complex undertaking, indicative of the systems and tangled interactions that characterise sustainability science more broadly.

By assessing how the procurement function can be leveraged and operationalised towards sustainability goals through a lens of optimal portfolio management, the authors provide a way forward for the procurement managers working within large retailers and agri-food businesses to progress towards multiple sustainability pillars simultaneously.

Data envelopment analysis (DEA) is used to determine the relative efficiency of the top-ranked gynecology departments in the United States as designated by the U.S. News & World Report ranking. DEA is a linear programming base procedure used to determine the relative efficiency of operating units that have similar characteristics. Efficiency scores are calculated by comparing two different input sets to the performance of each gynecological department. Ranking based on DEA more completely and accurately represents gynecological departments. Further, DEA makes it possible to fairly compare specific departments. The new ranking coupled with the efficiency score accrued by each hospital will motivate and guide hospital administrators to improve the performance of hospital gynecology departments by better utilizing expensive resources.

The farm sector is crucial for rural poverty alleviation, alongside the non-farm sector, which contributes to mitigating risks associated with crop failures. This paper investigates the effects of public policies on productive employment within both the farm and non-farm sectors in sub-Saharan Africa.

A meta-analysis is conducted exclusively on the results of the Partnership for Economic Policy (PEP)-funded studies under the Policy Analysis on Growth and Employment (PAGE II) initiative. Selected studies focused on the impact of public policies on productive employment in rural farm and non-farm sectors, encompassing a total of nine sub-Saharan Africa countries in: Benin, Burkina Faso, Cote d'Ivoire, Democratic Republic of Congo, Ghana, Lesotho, Nigeria, Senegal and South Africa.

The results indicate that public investments in rural areas and public policies that facilitate access to productive resources are likely to enhance productive employment. The overall effect size is positive and significant, ranging from 2% to 10% increases in productive employment. Sources of variation include the sector of activity and the policy instrument. In addition, the policy effects are gender-sensitive and seem more consistent in the non-farm sector.

Although the selected working papers addressed several aspects of productive employment, other aspects warrant further investigation. Policies involving restrictions or regulations have received little attention in the impact analysis. Researches to fill this gap would be important. Another suggestion for further research is the analysis of the relative importance of non-farm employment in rural areas in developing countries. It is always assumed that rural households depend heavily on agriculture for their subsistence.

The contribution of the paper lies in the comparative analysis of numerous public policies implemented in nine distinct countries. By consolidating data from fourteen 14 different experiences into a single study, the paper offers valuable insights on factors that determine policy effectiveness and contribute to understanding what worked for whom and why.

Observes that variances in standards for and interpretations of intellectual property rights (IPR) around the globe remain one of the great challenges for marketers and stakeholders of the marketing paradigm. Attempts to distil the issues surrounding IPR and its protection, and to examine the phenomenon of IPR violations within a framework of social dilemmas. In so doing, describes and provides examples for some of the problems associated with IPR violations. Contends that much work is still to be done, if it is hoped to implement a global system for IPR protection that serves the best long‐term interests for the largest number of society’s stakeholders. Concludes with opportunities for further research.

The purpose of this paper is to examine the effectiveness of two regulatory initiatives in developing awareness of conduct risk associated with algorithmic and direct-electronic access (DEA) trading at broker-dealers: the UK Financial Conduct Authority’s algorithmic trading compliance in the wholesale markets and Commission Delegated Regulation 2017/589 (CDR 589) to the second Markets in Financial Instruments Directive.

A qualitative examination of 15 semi-structured interviews with representatives of London Metal Exchange member firms, their clients and regulators.

This paper finds that the key conduct related messages in algorithmic trading compliance in the wholesale markets may not yet be fully embedded at broker–dealers. This is because of a perceived simplicity of the algorithms deployed by broker dealers or, alternatively, a lack of reflection on their impact. Conversely, a concern exists that clients’ deployment of algorithms on DEA channels provided by broker–dealers increase conduct risk. However, the threat of harm posed by clients is not envisaged in current definitions of conduct risk. Accordingly, CDR 2017/589 does not currently require firms to evaluate clients’ awareness of it.

This study’s findings are limited to the insights provided by 15 participants.

This paper contributes to existing research by deepening understanding of conduct risk arising from algorithmic trading and DEA. To account for the potential harm arising from clients’ activities, this paper proposes a revision to Miles’s definition of conduct risk. This is complemented by a proposed amendment to CDR 2017/589 to require evaluation of clients’ understanding of conduct risk.

We conduct a literature review on forms of organizing that address grand challenges, which are operationalized as the Sustainable Development Goals of the United Nations, as this framework is universal and widely adopted. By analyzing the articles that match our criteria, we identify six differentiable organizational forms: movements, temporary organizations, partnerships, established organizations, multi-stakeholder networks, and supranational organizations. These six forms are differentiated based on the two following categories: organizing segment and communicational technological approach. Our analysis shows that tackling a grand challenge often starts with collectives as a protest culture without any expected goal, besides sending an impulse to others. This impulse is received by criticized institutionalized organizations that have the capacity and resources to address the problem properly. However, new challenges arise as these organizations inadequately resolve these problems, thereby leading to conflict-laden areas of tension, wherein emergent organizations complement institutionalized organizations that have created the first infrastructure. To solve the most complex problems, a trichotomous relationship between different forms of organizations is necessary. Moreover, communicational technological approaches become more sophisticated as grand challenges increase in complexity.

This empirical study aims to examine the association between gender-diverse boards and corporate carbon emissions and estimates the effect of board gender diversity on stock price reactions to climate activism. This study contributes to the inconclusive literature on the link between gender-diverse boards and firms' financial performance by examining a single and plausibly isolated channel of association (i.e. attention to climate change).

The authors use parametric and non-parametric panel data techniques to examine the association between gender-diverse boards to corporate carbon emission. The system generalized methods of moments (SYS-GMM) estimator is used to address endogeneity concerns. The authors use the event study methodology to examine difference in stock price reactions to climate activism.

The results show that high board gender diversity is associated with lower corporate carbon emissions and higher stock returns to climate activism.

This is the first study to isolate public attention to climate change as a relevant channel through which gender-diverse boards have an impact of firms' financial performance. This study is timely and important due to the immediate threat of global warming and the recent introduction of mandatory board gender quotas in many countries around the world.

The purpose of this paper is to propose Neo-Durkheimian institutional theory, developed by the Durkheimian institutional theory, as developed by anthropologist Mary Douglas, as a suitable theory base for undertaking cross-cultural accounting research. The social theory provides a structure for examining within-country and cross-country actions and behaviours of different groups and communities. It avoids associating nations and cultures, instead contending any nation will comprise four different solidarities engaging in constant dialogues. Further, it is a dynamic theory able to take account of cultural change.

The paper establishes a case for using neo-Durkheimian institutional theory in cross-cultural accounting research by specifying the key components of the theory and addressing common criticisms. To illustrate how the theory might be utilised in the domain of accounting and finance research, a comparative interpretation of the different experiences of financialization in Germany and the UK is provided drawing on Douglas’s grid-group schema.

Neo-Durkheimian institutional theory is deemed sufficiently capable of interpreting the behaviours of different social groups and is not open to the same criticisms as Hofstede’s work. Differences in Douglasian cultural dialogues in the post-1945 history of Germany and the UK provide an explanation of the variations in the comparative experiences of financialization.

Neo-Durkheimian institutional theory has been used in a wide range of contexts; however, it has been little used in the context of accounting research. The adoption of the theory in future accounting research can redress a Hofstedian-bias in accounting research.

Although management scholars have embraced grand challenges research, in many cases, grand challenges have been treated as merely a context for exploring extant theoretical perspectives. By comparison, our approach – robust action – provides a novel theoretical framework for tackling grand challenges. In this invited article, we revisit our 2015 model, clarifying and elaborating its key elements and taking stock of subsequent developments. We then identify three promising directions for future research: scaffolding, future imaginaries, and distributed actorhood. Ultimately, our core message is remarkably simple: robust action strategies – participatory architecture, multivocal inscription and distributed experimentation – jointly provide a means for tackling grand challenges that is well matched to their complexities, uncertainties, and evaluativities.