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The purpose of this paper is to investigate the impact of Jewish holidays on US stock market returns.

The authors use event study and regression methodology to determine abnormal returns on Jewish holidays and windowed periods surrounding the day. In order to seclude the results to Jewish holidays, the authors control for several other known events that impact stock market returns. To substantiate claims of abnormal returns, the authors also use the Fama‐French four‐factor model to seek alpha and evidence returns on Jewish holidays.

This study shows, during the 1990‐2009 period, an increase in average daily returns 32 times greater on nine Jewish holidays than on the other trading days of the year. The demeanor of the specific Jewish holidays also influences stock market returns, as the market returns increase (decrease) on the joyous (solemn) Jewish holidays. Also, individual investors, rather than institutional investors, are a greater catalyst for the increased returns.

Previous research details increased stock market returns on US holidays and several other events. However, no definable research exists on stock market returns on Jewish holidays. The findings in this paper are valuable to investors who event‐trade, and are also valuable to investors and behavioral‐finance researchers who seek to understand how demeanor and moods may impact buying/selling decisions.

Ontologies are defined as consensual formal conceptualisation of shared knowledge. However, the explicit overlap between diverse ontologies is usually very low since they are typically constructed by different experts. Hence, the purpose of this paper is to suggest to exploit “wisdom of crowds” to assess the maximal potential for inter-ontology agreement on controversial domains.

The authors propose a scheme where independent ontology users can explicitly express their opinions on the specified set of ontologies. The collected user opinions are further employed as features for machine classification algorithm to distinguish between the consensual ontological relations and the controversial ones. In addition, the authors devised new evaluation methods to measure the reliability and accuracy of the presented scheme.

The accuracy of the relation classification (90 per cent) and the reliability of user agreement annotations were quite high (over 90 per cent). These results indicate a fair ability of the scheme to learn the maximal set of consensual relations out of the specified set of diverse ontologies.

The data sets and the group of participants in our experiments were of limited size and thus the presented results are promising but cannot be generalised at this stage of research.

A diversity of opinions expressed by different ontologies has to be resolved in order to digitise many domains of knowledge (e.g. cultural heritage, folklore, medicine, economy, religion, history, art). This work presents a methodology to formally represent this diverse knowledge in a rich semantic scheme where there is a need to distinguish between the commonly shared and the controversial relations.

To the best of the knowledge this is a first proposal to consider crowd-based evaluation and classification of ontological relations to maximise the inter-ontology agreement.

Ontologies are prone to wide semantic variability due to subjective points of view of their composers. The purpose of this paper is to propose a new approach for maximal unification of diverse ontologies for controversial domains by their relations.

Effective matching or unification of multiple ontologies for a specific domain is crucial for the success of many semantic web applications, such as semantic information retrieval and organization, document tagging, summarization and search. To this end, numerous automatic and semi-automatic techniques were proposed in the past decade that attempt to identify similar entities, mostly classes, in diverse ontologies for similar domains. Apparently, matching individual entities cannot result in full integration of ontologies’ semantics without matching their inter-relations with all other-related classes (and instances). However, semantic matching of ontological relations still constitutes a major research challenge. Therefore, in this paper the authors propose a new paradigm for assessment of maximal possible matching and unification of ontological relations. To this end, several unification rules for ontological relations were devised based on ontological reference rules, and lexical and textual entailment. These rules were semi-automatically implemented to extend a given ontology with semantically matching relations from another ontology for a similar domain. Then, the ontologies were unified through these similar pairs of relations. The authors observe that these rules can be also facilitated to reveal the contradictory relations in different ontologies.

To assess the feasibility of the approach two experiments were conducted with different sets of multiple personal ontologies on controversial domains constructed by trained subjects. The results for about 50 distinct ontology pairs demonstrate a good potential of the methodology for increasing inter-ontology agreement. Furthermore, the authors show that the presented methodology can lead to a complete unification of multiple semantically heterogeneous ontologies.

This is a conceptual study that presents a new approach for semantic unification of ontologies by a devised set of rules along with the initial experimental evidence of its feasibility and effectiveness. However, this methodology has to be fully automatically implemented and tested on a larger dataset in future research.

This result has implication for semantic search, since a richer ontology, comprised of multiple aspects and viewpoints of the domain of knowledge, enhances discoverability and improves search results.

To the best of the knowledge, this is the first study to examine and assess the maximal level of semantic relation-based ontology unification.

With this paper we aimed to explore the matter of space as a physical expression of institutional logics. Following recent discussions on the role of materiality in organizational discourse, this study focused on spatial dimensions of institutional logics, namely, spatialized logics. Utilizing Lefebvre’s (1991) analytic distinction among three layers of space – conceived, lived, and perceived – we described the spatial expressions of distinct logics and the spatial relations among these logics. Drawing on a qualitative case study analysis of the world-renowned site of Jerusalem’s Western Wall, we argued that logics take form in space, logics get embodied in different layers of space, and matters of discursive commensurability and leakages also have spatial expressions. To exemplify these claims we undertook a qualitative case study analysis of Jerusalem’s Western Wall. The Wall is a 500-meter-long and two-millennia-old construction. We showed that, while in material and technical terms the Wall is a singular entity, three distinct logics occupy distinct sections along the Wall, and each of these logics reinterprets the materials and technicalities in distinct ways: religious, professional, and nationalistic. These three distinct spatialized logics get embodied in the conceived space (planning and policy of the site), perceived space (comments and opinions about the site), and lived space (behavior and social interaction at the site). Overall, by interjecting notions of materiality and space into the conversation about institutional logics, we demonstrated that in the physical layout of a space, logic cohesion, and interlogic commensurability literally become a “turf war.”

The compilation of a core collection for Jewish reference sources raises a number of questions which must be confronted and answered. Should a Jewish reference collection be a listing of sources for the study of Judaism primarily as a religion, or primarily as a cultural group? Should the sources be leaning toward Biblical and Rabbinic studies or towards history, art, and music? For the purposes of this bibliography, I have chosen to concentrate on the cultural aspects of Judaism and Jews as a group to be studied. As such I have elected, somewhat arbitrarily, to exclude the primary sources of the study of Judaism as a religion, these sources being a Jewish version of an English translation of the Bible, an English copy of the Talmud, liturgies, and all of the supplementary primary sources which would be necessary. It is hoped, instead, that those items would be found in the religion section of the reference collection. Nevertheless, this core collection will provide the tools for any interested person seeking to include such sources in their Judaic reference collection.

This study aims to explore the hospitality and religious experience of Israeli travelers visiting the globally prevalent Jewish Orthodox Chabad Houses that provide religious, spiritual, educational and hospitality havens in their locales, regardless of the degree of observance.

Using Schmitt’s (1999b) experiential consumption dimensions of Sense, Feel, Think, Relate and Act, this study measured the various visitors’ experiences, satisfaction and loyalty using a sample of 488 Israeli travelers obtained from online social media sites, popular with Israeli travelers.

The findings reveal that Israeli visits to Chabad Houses were primarily characterized by Act, Feel and Relate experiences like meeting fellow Israeli travelers, a sense of togetherness and a feeling of belonging. In predicting satisfaction and loyalty, the visitors’ religious experience did not play a major role, but rather the actual hospitality extended by their religious hosts, like a home-like feeling, comfort, tasty food and a sense of togetherness did.

Collecting data from an online sample might yield results that would not be applicable to the typical Chabad House visitor. Due to the Chabad Houses’ global presence, their visitors’ experiences may vary from one house to another and the findings may not represent an accurate picture of the typical Chabad House visit.

To continue its hospitality brand, the Chabad movement’s decision-makers should continue focusing on innovative visitor experiences and balance the religious and secular components of their hospitality, as well as consider carefully how to direct their marketing and operational budgets.

Adding to the body of literature on travelers’ experience at religious sites, this research is a pioneering attempt to study and explore visitors’ religious and hospitality experiences while visiting small non-conspicuous religious centers that extend their global hospitality brand to travelers.

Models the trade-offs between education in secular subjects, formal and informal, and the formation of religion-specific human capital. Explores some implications of negative externalities between religious and secular education. Develops hypotheses about religious tensions in the American public school system and means of coping with them. Discusses some implications for social cohesion in a religiously pluralistic school system.

This article explores the varied ways that individuals create and use calendars, planners and other cognitive artifacts to document the multiple temporalities that make up their everyday lives. It reveals the hidden documentary time work required to synchronize, coordinate or entrain their activities to those of others.

We interviewed 47 Canadian participants in their homes, workplaces or other locations and photographed their documents. We analyzed qualitatively; first thematically to identify mentions of times, and then relationally to reveal how documentary time work was situated within participants' broader contexts.

Participants' documents revealed a wide variety of temporalities, some embedded in the templates they used, and others added by document creators and users. Participants' documentary time work involved creating and using a variety of tools and strategies to reconcile and manage multiple temporalities and indexical time concepts that held multiple meanings. Their work employed both standard “off the shelf” and individualized “do-it-yourself” approaches.

This article combines several concepts of invisible work (document work, time work, articulation work) to show both how individuals engage in documentary time work and how that work is situated within broader social and temporal contexts and standards.

The Equal Pay Act 1970 (which came into operation on 29 December 1975) provides for an “equality clause” to be written into all contracts of employment. S.1(2) (a) of the 1970 Act (which has been amended by the Sex Discrimination Act 1975) provides: