Scalar induced gravitational waves in modified teleparallel gravity theories

Primordial black holes (PBHs) forming out of the collapse of enhanced cosmological perturbations provide access to the early Universe through their associated observational signatures. In particular, enhanced cosmological perturbations collapsing to form PBHs are responsible for the generation of a stochastic gravitational-wave background (SGWB) induced by second-order gravitational interactions, usually called scalar induced gravitational waves (SIGWs). This SGWB is sensitive to the underlying gravitational theory; hence it can be used as a novel tool to test the standard paradigm of gravity and constrain possible deviations from general relativity. In this work, we study the aforementioned GW signal within modified teleparallel gravity theories, developing a formalism for the derivation of the GW spectral abundance within any form of gravitational action. At the end, working within viable $f(T,\phi)$ models without matter-gravity couplings, and accounting for the effect of mono-parametric $f(T)$ gravity at the level of the source and the propagation of the tensor perturbations, we show that the respective GW signal is indistinguishable from that within GR. Interestingly, we find that in order to break the degeneracy between different $f(T)$ theories through the portal of SIGWs one should necessarily consider non-minimal matter-gravity couplings at the level of the gravitational action.Comment: 16 pages without appendices (24 in total), 2 figure

The Global/Local Product Attribute: Decomposition, Trivialization and Price Tradeoffs in Emerging and Developed Markets

Accelerating anti-globalization challenges previously undisputed assumptions about the importance of a product’s globalness/localness in purchase decisions. Putting these assumptions to test, we conceptualize globalness/localness as a distinct product attribute and decompose its utility into weight and preference components. Subsequently, we offer an equity-theory-based prediction of the attribute’s declining relevance and quantify its tradeoffs with other attributes by calculating global/local price premiums. Conjoint experiments in two countries (Austria-India) reveal that (1) emerging (developed) market consumers exhibit relative preference for global (local) products, (2) emerging market consumers perceive higher preference inequity between global and local products than developed market consumers, and (3) the corresponding inequity triggers consumers’ cognitive inequity regulation (manifested through attribute trivialization in developed markets) and behavioral inequity regulation (manifested through asymmetrical willingness to pay for global/local products across developed/emerging markets). We also find that attribute trivialization and price premium tolerance are moderated by consumers’ spatial identities and price segment. The findings contribute to the theoretical debate on the relevance of product globalness/localness in de-globalizing times and inform competitive strategy, segmentation-targeting-positioning, and international pricing decisions

Signatures of Superstring theory in NANOGrav

In this Letter, we extract for the first time signatures of Superstring theory in the recently released NANOGrav data. We concentrate on the primordial gravitational wave (GW) spectrum induced by the gravitational potential of a population of primordial black holes (PBHs) generated in the framework of no-scale Supergravity. In particular, working within Wess-Zumino type no-scale Supergravity we find naturally-realised inflection-point inflationary potentials, which can give rise to the formation of microscopic PBHs triggering an early matter-dominated era (eMD) and evaporating before Big Bang Nucleosythesis (BBN). Remarkably, we obtain an abundant production of gravitational waves, whose profile is quite distinctive, characterized by a strong oscillatory pattern and being in strong agreement with NANOGrav data. Hence, such a signal can act as a potential signature of no-scale Supergravity and Superstring theory at the current and near-future GW observations.Comment: Minor changes: new references and small discussion adde

How Downplaying Product Greenness Affects Performance Evaluations: Examining the Effects of Implicit and Explicit Green Signals in Advertising

Despite frequent reports that they favor products with environmental benefits, consumers often purchase conventional alternatives. One reason for this is the performance liability associated with green products, in which consumers perceive them as being less effective. This research examines the concept of “green understatement” (i.e., communication of implicit green signals) compared with “green emphasis” (i.e., communication of explicit green signals) in green product advertising as a strategy to enhance performance evaluations. We test whether, why, and when an implicit (versus explicit) advertising strategy leads to higher performance evaluation for green products. We suggest and show that implicit green signals are more effective in conditions under which consumers have more concerns about the product’s performance or have lower expectations about its greenness. More specifically, the results of two experimental studies show that implicit (versus explicit) communication about greenness leads to higher performance evaluations for products that are less commonly green (Study 1) and for products that have an optional green mode (Study 2). The findings aid in the understanding of how a green product advertising strategy may influence performance evaluations and provide managerial implications for green product promotion

Perturbative instabilities in Horava gravity

We investigate the scalar and tensor perturbations in Horava gravity, with and without detailed balance, around a flat background. Once both types of perturbations are taken into account, it is revealed that the theory is plagued by ghost-like scalar instabilities in the range of parameters which would render it power-counting renormalizable, that cannot be overcome by simple tricks such as analytic continuation. Implementing a consistent flow between the UV and IR limits seems thus more challenging than initially presumed, regardless of whether the theory approaches General Relativity at low energies or not. Even in the phenomenologically viable parameter space, the tensor sector leads to additional potential problems, such as fine-tunings and super-luminal propagation.Comment: 21 pages, version published at Class. Quant. Gra

How Historical and Social Aspirations Reshape the Relationship between Corporate Financial Performance and Corporate Social Responsibility?

Integrating the behavioral theory of the firm into the discussion on why firms behave in socially responsible ways, the study here develops and empirically tests hypotheses articulating when and how past corporate financial performance (CFP) might lead to more or less engagement in corporate social responsibility (CSR). Rather than treating historical and social aspirations as comparable performance benchmarks that yield similar behavioral responses, as most prior studies do, these two modes of performance comparison may induce signals that executives interpret differently, and therefore may lead to conflicting firm responses towards CSR initiatives. Using panel data pertaining to a large sample of U.S. firms, the study finds that historical and social performance comparisons have differential effects on CSR engagement. The findings describe how different interpretations of achievement influence firm’s engagement in secondary activities concerning environmental and social issues—a topic that has received very little attention in prior empirical research

A Step-by-Step Guide of (Fuzzy Set) Qualitative Comparative Analysis: From Theory to Practice via an Implementation in a B2B Context

One of the challenges researchers face in using an analytic method is to fully understand its underlying logic and find ways to successfully incorporate it into the research process. Qualitative Comparative Analysis (QCA) is an example in case, where such a challenge has been partly addressed so far, despite the increasing popularity of the method. Although QCA user guides are widely available, researchers may face difficulties in implementing the method to address real-world, complex social phenomena. To address this issue, the present methodological paper provides a step-by-step guide of QCA and links the background theory of the method to its practical implementation, via an example in the business-to business (B2B) context of open and closed innovation. The paper provides practitioners and researchers alike with a clear roadmap on how to exploit the full potential of the method in order to derive insightful explanations in applied data analysis

Expanding into new product lines in response to COVID-19: The interplay between firm age and performance aspirations

Unprecedented environmental shocks, like the outbreak of COVID-19, sometimes trigger firms to adjust to the new environment, by expanding quickly into new—relevant to the shock—product lines, as a means to capitalize on the booming demand of urgently needed supplies. This study examines the role of firm corporate liabilities, as the ones enclosed to firm age, in influencing the number of new product lines a firm introduces in response to the pandemic, and its reaction time to the shock. The way in which performance aspirations interfere in these managerial decisions is also examined. In testing hypotheses, we employ a novel multivariate matching approach, namely entropy balancing, which allows researchers to create balanced samples and accounts for the existence of non-random factors influencing the results. Using a sample of 973 manufacturers that introduced new product lines in response to COVID-19, our hypotheses, positively linking firm age to product line introductions, and negatively to response time to the environmental shock, are supported. Our results indicate that for firms with higher levels of performance above industry average, the positive influence of firm's age on the number of new product lines introduced is weaker than for firms with lower levels of performance above industry average