Faculty & Research

Research Productive

Show result

Search Query :
Area :
Search Query :
3721 items in total found

Journal Articles | 2017

A novel sandwich algorithm for empirical Bayes analysis of rank data

Arnab Kumar Laha, Somak Dutta, and Vivekananda Roy

Statistics and its interface

Rank data arises frequently in marketing, finance, organizational behavior, and psychology. Most analysis of rank data reported in the literature assumes the presence of one or more variables (sometimes latent) based on whose values the items are ranked. In this paper we analyze rank data using a purely probabilistic model where the observed ranks are assumed to be perturbed versions of the true rank and each perturbation has a specific probability of occurring. We consider the general case when covariate information is present and has an impact on the rankings. An empirical Bayes approach is taken for estimating the model parameters. The Gibbs sampler is shown to converge very slowly to the target posterior distribution and we show that some of the widely used empirical convergence diagnostic tools may fail to detect this lack of convergence. We propose a novel, fast mixing sandwich algorithm for exploring the posterior distribution. An EM algorithm based on Markov chain Monte Carlo (MCMC) sampling is developed for estimating prior hyperparameters. A real life rank data set is analyzed using the methods developed in the paper. The results obtained indicate the usefulness of these methods in analyzing rank data with covariate information.

Read More

Journal Articles | 2017

Distribution of Traffic Accident Times in India - Some Insights using Circular Data Analysis

Arnab Kumar Laha, Pravida Raja A.C., and Dilip Kumar Ghosh

International Journal of Business Analytics and Intelligence

Traffic accidents are a major hazard for travellers on Indian roads. These are caused by a variety of reasons including the bad condition of roads, traffic density, lack of proper training of drivers, slack in enforcement of traffic rules, poor road lighting etc. It is further known that certain times of the day are more prone to traffic accidents than others. In this paper we investigate the distribution of traffic accident times using the data published annually by the National Crime Records Bureau (NCRB) over the period 2001-2014 using the tools of circular data analysis. It is seen that the observed distribution of the traffic accident times in most years is bimodal. Thus, several modelling strategies for bimodal distributions are tried which include fitting of mixture of von-Mises distributions and mixture of Kato-Jones distribution. It is seen from this analysis that the distribution of the traffic accident times are changing over the years. Notably, the proportion of accidents happening in late night has reduced over the years while the same has increased for late evening hours. Some more insights obtained from this analysis are also discussed.

Read More

Journal Articles | 2017

Through the looking Glass: Role of construal level on description-intensive reviews

Swagato Chatterjee and Aruna Divya T

Advances in Consumer Research

Focus on consumer engagement has led service providers to explore contextual factors influencing consumers’ satisfaction. In this paper, we draw insights from Construal Level Theory to identify the conditions when own vs. others’ experiences along with Process vs. Outcome attributes of services become more important in overall service evaluation

Read More

Journal Articles | 2017

Please do interrupt, but nicely! The effect of positive and negative interruptions on product evaluation and choice

Ankur Kapoor and Arvind Sahay

Advances in Consumer Research, 45, 701-702

This research studies the affective consequences of interruptions on evaluation and choice. Six studies demonstrate that positive (negative) interruptions lead to unfavourable (favourable) evaluation and lower (higher) choice of pre-interruption products; but favourable (unfavourable) evaluation and higher (lower) choice of post-interruption products. Relevant mediation and moderation effects are also found.

Read More

Journal Articles | 2017

Do celebrities have it all? Context collapse and the networked publics

Asha Kaul and Vidhi Chaudhri

Journal of Human Values

With the advent of social media and increase in networked publics, context collapse has emerged as a critical topic in the discussion of imagined audiences and blurring of the private and the public. The meshing of social contexts portends problematic issues as messages inadvertently reach unimagined audiences causing shame and leading to loss of ‘face’. In this article, we specifically study the impact of context collapse on some celebrities ‘who had it all’ yet, lost ‘it some’ to the world of networked public. The article examines celebrities sharing identity information across multiple contexts and explores situations of lost fame when ‘face’ is threatened, usage falters and breaks some of the well-established norms of interactivity. It concludes that lack of prudence in separating social contexts, loss of ‘face’ and social approval can dampen online celebrity presence. It proposes the use of ‘polysemy’ to simultaneously appeal to audiences from different contexts.

Read More

Journal Articles | 2017

How to answer some tricky interview questions?

Asha Kaul

HBR Ascend

Journal Articles | 2017

Impact of religion-based caste system on the dynamics of Indian trade unions: Evidence from two state-owned organizations in North India

Jatin Pandey and Biju Varkkey

Business and Society

Religion and its envisaged structures have both macro- and micro-level implications for business. Of the many stratification schemas prevalent in India, two macro-social stratification schemas are important at the workplace: caste, which has been an age-old, religion-mandated, closed social stratification prevalent in Hinduism that had led to inequality in the society, and trade union, which is a relatively new and optional open workplace stratification that empowers workers and fosters equality. This study tries to decipher whether these two structures influence each other; if yes how and why do they influence each other (the tensions and contradictions that may happen between them), and whether the influence is uniform for all members. We conducted in-depth interviews with 43 trade union members, three trade union leaders of two state-owned organizations in North India. Initially, we found that caste does not have any superficial effect on the relationship between union members. However, a deeper analysis reveals that roots of this social reality reflect in the social and workplace exchanges between union members, and affect their social identity and loyalty. In the discussion we present a model of twin loyalties between union and caste. From the institutional logic perspective, we also delineate the caste and trade union perspective, and show how there is a change in trade union identity because of the influence of caste-based logic. Our findings have implications for industrial democracy, worker representation, and union effectiveness.

Read More

Journal Articles | 2017

Convergence or Divergence: The impact of globalization on employee relations in India and China

Jatinder Kumar Jha and Biju Varkkey

International Journal of Employment Studies

This paper explores the underlying principles of employee relations and the pattern of their evolution in India and China, in the context of globalisation. Globalisation has deeply influenced the way economies function and altered the national patterns of employee relations. Using evidences from available extant literature, we mapped the approaches taken by both India and China to highlight the impact of globalisation on employee relations and found that competition, followed by globalisation, and changes in the trade union structures, have prompted the introduction of the 'human' element to employee relations practices, particularly at the enterprise level; besides, a lucid convergence in employee relations patterns is also witnessed, alongside some divergences in the approaches. The points of convergence include the introduction of the human element in employee relations, labour flexibility, reduction in union membership and increased focus on individual employment contracts. Divergence is primarily witnessed in the degree of involvement of trade unions and governments in employee relations. The differences in patterns observed between the countries can be attributed to the unique institutional factors of each country.

Read More

Journal Articles | 2017

Contribution of HR systems in development of ethical climate at workplace: A case study

Jatinder Kumar Jha, Biju Varkkey, Praveen Agrawal, and Narendra Singh

South Asian Journal of Human Resource Management

This article elucidates the relationship between HR systems and ethical climate at workplace with primary focus on the procedure adopted for development of ethical climate, using case study of an Indian power distribution company (Tata Power Delhi Distribution Limited [TPDDL]). The study categorizes TPDDL’s endeavours undertaken into two categories, explicit and implicit initiatives. Explicit ways of promoting ethics include ethics trainings, seminars on ethics, rewards and punishment policy, and mechanism of reporting ethical concerns/issues (ethics portal, whistle blower policy, IVRS, etc.). Implicit ways of creating ethical climate include HR practices, namely selective selection, training for developing interpersonal and technical skills, fair performance appraisal system and various engagement initiatives. The support and guidance of the senior management and line managers ensured successful execution of both initiatives. Results from the study suggest, over the period of time, the untiring efforts of various actors that saw the development of an ethical climate.

Read More

Journal Articles | 2017

Professionalizing religious family-owned organizations: An examination of human resource challenges

Anamika Sinha, Jatin Pandey, and Biju Varkkey

South Asian Journal of Management

Transformation of the Human Resource (HR) function from the traditional to a modern and professional one continues to be a challenge for most family-owned organizations. This paper discusses the traditional HR practices followed in an Indian religious family-owned organization, the actions taken during the transformation process of professionalizing the firm and the challenges faced by the newly recruited HR head while executing this process, along with the change management schema adopted for professionalization. During this process, deeply-rooted traditions prevalent in the firm had to be a balanced with a need for modernization. A steady approach with small steps at a time-rather than a radical transformation at a fast pace-was adopted for the change process. The intention of the professionalization process was not to harm or do away with the inherent good people-management practices that already existed but build upon them. At the same time, practices and styles had to be changed, and concerns of employees addressed. The paper also brings forth the impact of owner/promoter's religious beliefs on the organizational and also opens avenues for future research on the relatively unexplored domains of religion and management. We discuss a three-pronged plan comprising of overall strategy development, tuning the HR systems to meet transformation goals and building a new professional culture. The paper adds to the existing theory and practice by proposing the secularization matrix for managing transformation in such organizations.

Read More
IIMA