bluuebunny/crossref_metadata_2025_split huggingface dataset:
Compositional knockoff filter for high-dimensional regression analysis of microbiome data
Authors: Srinivasan Arun , Xue Lingzhou , Zhan Xiang 
Published: November 2019

SummaryA critical task in microbiome data analysis is to explore the association between a scalar response of interest and a large number of microbial taxa that are summarized as compositional data at different taxonomic levels. Motivated by fine-mapping of the microbiome, we propose a two-step compositional knockoff filter (CKF) to provide the effective finite-sample false discovery rate (FDR) control in high-dimensional linear log-contrast regression analysis of microbiome compositional data. In the first step, we employ the compositional screening procedure to remove insignificant microbial taxa while retaining the essential sum-to-zero constraint. In the second step, we extend the knockoff filter to identify the significant microbial taxa in the sparse regression model for compositional data. Thereby, a subset of the microbes is selected from the high-dimensional microbial taxa as related to the response using a pre-specified FDR threshold. We study the asymptotic properties of the proposed two-step procedure, including both sure screening and effective false discovery control. We demonstrate the finite-sample properties in simulation studies, which show the gain in the empirical power while controlling the nominal FDR. The potential usefulness of the proposed method is also illustrated with application to an inflammatory bowel disease dataset to identify microbial taxa that influence host gene expressions.
Dual paths to continuous online knowledge sharing: a repetitive behavior perspective
Authors: Kang Minhyung 
Published: November 2019

Purpose
Continuous knowledge sharing by active users, who are highly active in answering questions, is crucial to the sustenance of social question-and-answer (Q&A) sites. The purpose of this paper is to examine such knowledge sharing considering reason-based elaborate decision and habit-based automated cognitive processes.

Design/methodology/approach
To verify the research hypotheses, survey data on subjective intentions and web-crawled data on objective behavior are utilized. The sample size is 337 with the response rate of 27.2 percent. Negative binomial and hierarchical linear regressions are used given the skewed distribution of the dependent variable (i.e. the number of answers).

Findings
Both elaborate decision (linking satisfaction, intentions and continuance behavior) and automated cognitive processes (linking past and continuance behavior) are significant and substitutable.

Research limitations/implications
By measuring both subjective intentions and objective behavior, it verifies a detailed mechanism linking continuance intentions, past behavior and continuous knowledge sharing. The significant influence of automated cognitive processes implies that online knowledge sharing is habitual for active users.

Practical implications
Understanding that online knowledge sharing is habitual is imperative to maintaining continuous knowledge sharing by active users. Knowledge sharing trends should be monitored to check if the frequency of sharing decreases. Social Q&A sites should intervene to restore knowledge sharing behavior through personalized incentives.

Originality/value
This is the first study utilizing both subjective intentions and objective behavior data in the context of online knowledge sharing. It also introduces habit-based automated cognitive processes to this context. This approach extends the current understanding of continuous online knowledge sharing behavior.
Promoting perceived insider status of indigenous employees
Authors: Caron Joanie , Asselin Hugo , Beaudoin Jean-Michel , Muresanu Doïna 
Published: November 2019

PurposeWhile companies in developed countries are increasingly turning to indigenous employees, integration measures have met with mixed results. Low integration can lead to breach of the psychological contract, i.e. perceived mutual obligations between employee and employer. The purpose of this paper is to identify how leadership and organizational integration measures can be implemented to promote the perceived insider status (PIS) of indigenous employees, thereby fostering fulfillment of the psychological contract.Design/methodology/approachA search for relevant literature yielded 128 texts used to identify integration measures at the level of employee–supervisor relationships (leader-member exchanges, inclusive leadership) and at the level of employee–organization relationships (perceived organizational support, pro-diversity practices).FindingsMeasures related to leadership included recruiting qualified leaders, understanding cultural particularities, integrating diverse contributions and welcoming questions and challenges. Organizational measures included reaching a critical mass of indigenous employees, promoting equity and participation, developing skills, assigning meaningful tasks, maintaining good work relationships, facilitating work-life balance, providing employment security, fostering support from communities and monitoring practices.Originality/valueWhile PIS has been studied in western and culturally diverse contexts, it has received less attention in indigenous contexts. Yet, some indigenous cultural values are incompatible with the basic assumptions of mainstream theories. Furthermore, colonial policies and capitalist development have severely impacted traditional indigenous economic systems. Consequently, indigenous people are facing many barriers to employment in ways that often differ from the experiences of other minority groups.
Vodafone India: the Indian wireless industry
Authors: Gupta Atul , Nicovich Stef 
Published: November 2019

Learning outcomes
From a pedagogical point, the case may fulfill following objectives: First, to understand Vodafone’s position in the current environment. Does the environment present the elements that are necessary for them to thrive (as analyzed using a PESTEL framework)? Second, to understand the resources needed to build competitive advantage in an emerging market context (as analyzed using the Porter five forces model); and third, to understand the competitive challenges of conducting business in a highly (and sometimes capriciously) regulated industry.

Case overview/synopsis
The Indian Telecommunication sector is one of the fastest growing industries in the world. There are nine telecom operators who are pioneering this growth; however, five private companies: Bharti, Idea, Reliance, Aircel and Vodafone make up 78.86 per cent of the market. These five companies have the opportunity to increase their market share by expanding the services provided to rural India; however, the Indian Tax Authorities have caused some hesitation. Aside from being known as heavy handed and unpredictable, the authorities have also demanded that Vodafone pay them billions in taxes. These court cases have challenged the way that other telecom operators look at investing. The arrival of Reliance Jio as a new player in the Indian wireless space with deep pockets has not helped the already fierce competitive landscape. Reliance Jio is forcing all wireless companies including Vodafone to reevaluate their India strategy.

Complexity academic level
This case could be used in both MBA and executive education programs.

Supplementary materials
Teaching Notes are available for educators only. Please contact your library to gain login details or email support@emeraldinsight.com to request teaching notes.

Subject code
CSS 11: Strategy.
Managerial intentions for and employee perceptions of group-based incentives
Authors: Moilanen Sinikka , Ikäheimo Seppo 
Published: November 2019

PurposeThis paper aims to interpret and compare managerial intentions for and employee perceptions of group-based incentive systems.Design/methodology/approachThe data comprise interviews with managers and employees in four Finnish firms with experience of company-wide incentive systems involving profit-sharing and team-based rewards. Benefitting from social exchange theory, managers’ intentions and employees’ perceptions are examined.FindingsManagers’ and employees’ views resemble each other concerning profit-sharing as reflecting reciprocity rooted in perceived distributive fairness, whereas examination of the team-based rewards revealed impediments in reciprocity. While managerial intentions for team-based rewards refer to social exchange with economic intensity via selection of controllable performance measurements aimed at making individual-level effort count, the employees’ perceptions deem such metrics non-controllable, reflecting perceived distributive and procedural unfairness.Practical implicationsProfit-sharing seems to create fair social obligation and goal congruence between managers and employees, whereas team-based incentives easily suffer from unfairness, reducing their effectiveness.Originality/valueDistinguishing between managerial intentions and employee perceptions pertaining to incentive systems facilitated in-depth exploration of the social exchange inherent in them, conceptualized in terms of economic intensity, fairness and controllability. With this lens, qualitative analysis revealed differences in interpretations of controllability and fairness between the managerial intentions and employee perceptions. The central contribution to scholarship takes the form of interpretations reflecting upon these key findings.
Information acquisition and funding for public service agencies: imperfect categorizing
Authors: Zeng Tao , Lin Horn-Chern 
Published: November 2019

Purpose
The purpose of this paper is to explore the impact of information acquisition for the purpose of differentiating agencies operating in different localities on the design of optimal funding.

Design/methodology/approach
This paper is a theoretical study. The focus is on a situation in which agencies providing public services have perfect private information about their cost conditions before the government sets the formula for funding.

Findings
The authors show that, using a free signal correlated with costs of operation to differentiate agencies situated in different localities, the government can achieve better welfare for households across regions. However, when there exist non-negligible costs involved in the differentiating process, it may pay to acquire information only if the signal acquired is informative enough, i.e., the correlation between the signal and the agencies’ true cost conditions is strong enough.

Social implications
This paper is of interest to academics and policy makers. Acquiring information for tagging can be viewed as a preliminary screening process. Different types are then endowed with distinctly different incentives to control the costs of operating their agencies. Specifically, when the observed cost signal and the true cost conditions of agencies are positively correlated, the government should optimally be more aggressive in distorting the high-cost type’s effort decision by giving less incentive for the low-cost type agencies to cut costs than in the no-differentiation case, and vice versa.

Originality/value
This paper is the first study that explores the impact of information acquisition on the design of optimal funding for public service agencies.
The role of brand innovativeness on attitudes towards new products marketed by the brand
Authors: Hetet Blandine , Ackermann Claire-Lise , Mathieu Jean-Pierre 
Published: November 2019

Purpose
This paper aims to examine whether perceived brand innovativeness has a positive effect on new product evaluations, which individual variables mediate and moderate this effect and whether perceived brand innovativeness is reinforced by new product launch.

Design/methodology/approach
A total of 387 adults residing in France took part in a two-stage study. The two-stage research design aimed to investigate the effect of the introduction of a new product on brand perceptions. The innovation context used to test the hypotheses was the launch of a new electricity meter in the French market.

Findings
Brand innovativeness affects the way consumers evaluate new products launched by the brand. This effect is mediated by perceived newness and moderated by functional, hedonic and social consumer innovativeness. In addition, attitudes toward the brand improve as a result of the new product launch.

Research limitations/implications
Future research should test these hypotheses with other product categories and populations to provide external validity for the results and further investigate lack of support for some of the hypotheses.

Practical implications
The study’s findings highlight that the ability to develop and launch innovative products is not only know-how that is critical to innovation management but also a brand attribute stored in consumers’ minds that facilitates acceptance of the brand’s future new products.

Originality/value
This research addresses the underexplored question of how brand innovativeness and new product launch are interrelated. Extensive research has indeed shown the importance of customer-based brand equity and brand knowledge in evaluation and acceptance of new products. However, research on customer-based brand equity so far has paid limited attention to brand innovativeness. This research provides new findings on the relationship between brand innovativeness and new product evaluations.
Sustainability of tourism destinations and the importance of certification
Authors: Costa Jorge , Rodrigues Daniela , Gomes João 
Published: November 2019

Purpose
The desired balance between human activity and environmental development and protection requires a clear and equitable distribution of responsibilities, regarding consumption and behavior toward natural and cultural resources. This paper aims to take a look at the relationship between tourism and sustainable development and the prospect of certified sustainable tourism destinations.

Design/methodology/approach
The paper examines the literature on the impacts of tourism and the application of sustainable development principles in the context of destination development.

Findings
Environmental certification has proven to be an important policy instrument, helping consumers to choose products and services that are less harmful to the environment and more authentic, serving as a marketing tool for companies that differentiate their products in the market.

Originality/value
The process of certification of tourist destinations is an issue that is little discussed, despite the numerous advantages for the destinations.
Innovation and technology – the only answer for sustainable tourism growth
Authors: Loureiro António 
Published: November 2019

Purpose
This paper aims to explain how innovation can contribute to sustainable tourism growth, bearing in mind that tourism was never a factor of conflict but a factor and a sign of peace and prosperity.

Design/methodology/approach
The paper is based on information drawn from official information sources and relevant data from Travelport.

Findings
Sustainable tourism growth is unstoppable and is already a reality – proved by decades of permanent growth. Sustainable tourism growth is needed for economic, social, cultural, environmental and political reasons. A continued and sustainable tourism growth is possible with better management and the innovation and technology support.

Originality/value
Tourism performance in recent decades proves that tourism can meet societal expectations and demands at all levels and is a determinant factor of cultural interchange and an important pillar for peace and harmony between different nationalities.
Smartness and social networks as shapers of the tourism industry
Authors: Vargas-Sánchez Alfonso , Saltos Adolfo Elizondo 
Published: November 2019

PurposeThe purpose of this study is to present the state-of-the-art scientific research in the intersection between smart tourism and social networks to better understand the role of the latter (such as Facebook and Twitter) in the development of the smart paradigm in tourism, e.g. how the relationship between smart tourism and social networks has been observed by authors, or the techniques and analytical tools that are most broadly used to take advantage of available data in social networks to feed a smart logic in the management of tourism companies and destinations.Design/methodology/approachA systematic search in scientific databases (such as Web of Science and Scopus) was performed, with December 2018 as a closing date. Once duplications were eliminated and the adequacy the outputs obtained verified properly, a total of 61 documents were considered for this study, most of which were journal articles.FindingsThe characterization of research in this area with both a bibliometric and bibliographic analysis.Practical implicationsThe presentation of a detailed picture on the content of the research carried out in the abovementioned intersections: evolution over time; most prolific authors, institutions and countries; journals, conferences and publishers that have paid more attention to this topic; type of research performed, objects of study, methodologies used and main contributions.Originality/valueThe proposal of a research agenda in the field under study. To the best of the authors’ knowledge, there is no a similar work carried out in this field.
Testing Finch's hypothesis: The role of organismal modularity on the escape from actuarial senescence
Authors: Bernard Connor , Compagnoni Aldo , Salguero‐Gómez Roberto 
Published: November 2019

Abstract

Until recently, senescence was assumed to be a universal phenomenon. Evolutionary theories of senescence predict that no organism may escape the physiological decline that results in an increase in mortality risk and/or decline in fertility with age. However, evidence both in animals and plants has emerged in the last decade defying such predictions. Researchers are currently seeking mechanistic explanations for the observed variation in ageing trajectories.

We argue that the historical view on the inevitability of senescence is due, in part, to the development of its classical theories, which targeted primarily unitary organisms. In unitary species, the integration of resources and functions is high, and adult size is determined. In contrast, the architecture of modular organisms is indeterminate and built upon repeated modules. The isolation of mortality risk in species like hydra (Hydra spp.) or creosote brush Larrea tridentata may explain their null or even negative senescence.

Caleb Finch hypothesized three decades ago that species with the ability to compartmentalize risk may escape senescence. Here, we first review the evidence on organisms that slow down or even avoid senescence in the context of their architecture, along a continuum of unitarity‐modularity. Then, we use open‐access databases to comparatively analyse various moments of senescence and link longevity to the degree of anatomical modularity. Our analysis compares the pace of senescence across 138 plants and 151 animals, and the shape of senescence across a subset of these. Our comparative analysis reveals that plant species that are more modular do indeed tend to escape from senescence more often than those that are unitary. The role of modularity in animal senescence is less clear.

In light of novel support for Finch's hypothesis across a large diversity of plant species, and with less conclusive findings in animals, we identify new research directions. We highlight the opportunities related to age‐dependent mortality factors. Other areas for further research include the role of modularity in relation to endocrine actions, and the costs of modular anatomies.
Tropicalization may invert trophic state and carbon budget of shallow temperate rocky reefs
Authors: Peleg Ohad , Guy‐Haim Tamar , Yeruham Erez , Silverman Jacob , Rilov Gil 
Published: November 2019

Abstract

Global warming mediates and maintains the tropicalization of temperate marine ecosystems. Recent studies have demonstrated that this process causes shifts from algal forests to denuded non‐canopy states in temperate reefs. It has been suggested that these changes would incur significant consequences to ecosystem functioning.

In this study, we tested how tropicalization affects habitat‐provisioning functions and carbon turnover of a shallow reef in the fast‐warming and highly invaded southeastern Mediterranean Sea, in‐situ. On a single shallow reef, we conducted measurements of these functions in three habitats: dwindling native brown algal (Cystoseira) forest, dominant turf (formed by overgrazing of tropical rabbitfish) and expanding tropical shrubs dominated by red calcifying algae (Galaxaura rugosa).

Algal forest was an autotrophic net carbon sink and provided habitat for high species diversity and the largest community biomass. The denuded turf was heterotrophic and provided habitat for the lowest species diversity and community biomass. While diversity was as high in tropical shrubs as in the algal forest, it had lower biomass and functioned as a heterotrophic net carbon source.

Synthesis. Our study exemplifies possible functional consequences of tropicalization‐driven regime shifts on shallow temperate rocky reefs, and how these can invert the net trophic state and carbon balance.
A ‘Post‐Work’ World: Geographical Engagements with the Future of Work
Authors: MacLeavy Julie , Lapworth Andrew 
Published: November 2019

AbstractThis article reviews geographical research on labour market changes that pose a challenge to ‘work’ as a compelling category of analysis. Drawing inspiration from feminist scholarship that has sought to develop a frame for thinking about the concept of work so that other activities outside employment are recognised, it considers what everyday practices of work, including domestic and reproductive labour, can teach us about the realities and futures of contemporary capitalism. While ‘work’ has long served as a presumed norm or telos of ‘development’, this article considers the prospect of the ‘end of work’ and of a specific type of accompanying capitalist society. It outlines the challenges for policy making in bringing forth a ‘post‐work’ world without cementing social and economic inequality.