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The Black Scholes option pricing model has been put to extensive application both in research and in actual market place. However, the inputs for the model are generally obtained from the stock market which is considered less efficient than the options market. This leads to a difference in calculated price and observed price. This paper studies the bias empirically.

The purpose of this paper is to examine stocks that are most actively discussed by online posters and see if the messages posted about these stocks have information or if they are just noise.

This study uses messages posted on TheLion.com, which reports a real time list of the ten most actively discussed stocks. The stocks in this list at the daily market close during 2005‐2006 are examined. An event study is performed to estimate the daily abnormal returns on these stocks. Contemporaneous and lead–lag regressions of abnormal returns against message posting activities are performed.

Online posters prefer thinly traded micro‐cap stocks. On average, there is an abnormal return of 19.4 per cent on a stock the day it is one of the ten most talked about stocks. The number of messages posted about a stock on a given day is not only positively related with the stock's abnormal return on that day but it also positively predicts the next day's abnormal return.

It may be interesting to examine if the investor sentiment expressed in online messages has predictive power for micro‐cap stocks.

The results provide evidence to regulators that online talk affects stock prices. They show investors that there are inefficiencies in the stock market. They also suggest that corporate managers, especially of small firms, should monitor the stock message boards.

This study focuses on the micro‐cap stocks favored by online posters and finds that online talk has the power to predict the next‐day returns.

The purpose of this study is to prepare a state-of-the-art review on advanced ceramic materials including their fabrication techniques, characteristics, applications and wettability.

This review paper presents the various types of advanced ceramic materials according to their compounding elements, fabrication techniques of advanced ceramic powders as well as their consolidation, their characteristics, applications and wetting properties. Hydrophobic/hydrophilic properties of advanced ceramic materials are described in the paper with their state-of-the-art application areas. Optical properties of fine ceramics with their intrinsic characteristics are also presented within. Special focus is given to the brief description of application-based manipulation of wetting properties of advanced ceramics in the paper.

The study of wetting/hydrophobicity/hydrophilicity of ceramic materials is important by which it can be further modified to achieve the required applications. It also makes some sense that the material should be tested for its wetting properties when it is going to be used in some important applications like biomedical and dental. Also, these advanced ceramics are now often used in the fabrication of filters and membranes to purify liquid/water so the study of wetting characteristics of these materials becomes essential. The optical properties of advanced ceramics are equally making them suitable for many state-of-the-art applications. Dental, medical, imaging and electronics are the few sectors that use advanced ceramics for their optical properties.

This review paper includes various advanced ceramic materials according to their compounding elements, different fabrication techniques of powders and their consolidation, their characteristics, various application area and hydrophobic/hydrophilic properties.

The learning objectives are intended to stimulate the students’ comprehension of the various challenges faced by Indian startups in the digital ecosystem. With the changing working dynamics in organizations around the globe, managers are expected to explore unconventional business models to facilitate operational growth. The case study is a valuable resource for graduate students to enhance and evolve their critical thinking and solution-oriented skills as forthcoming managers of digital businesses. Students should be able to analyze the case, respond to the questions and evaluate the consequences of workplace flexibility, moonlighting and its applicability in an organizational context. With the Indian Government introducing schemes such as the Digital India initiative and Startup India, it is predicted that numerous startups will opt for digital business standards and a remote work approach. The case bridges classroom theories and a real-life digital company to help students connect with emerging market scenarios.

During the digital era, India witnessed a shift in companies’ work culture, which amplified when COVID-19 hit the country. Organizations started to work remotely and experienced the numerous benefits it brought. The comfort of working from home was greater for digital businesses whose significant operations could be performed online. However, is it really that productive for digital companies to telecommute? The case illustrates how a digital company, Career Pandit, formed in 2018, unfurls and expands its business and further highlights the challenges the pandemic raised concerning people management. In addition to the discussion, the purpose of the case is to determine the implication of workplace flexibility and moonlighting and how Indian startups cope with the uncertain future challenges it brings.

Under graduate and postgraduate students.

Teaching notes are available for educators only.

CSS 6: Human Resource Management.

The purpose of this paper is to review maintenance strategies within the healthcare domain and to discuss practical needs as gaps between research and practice.

The paper systematically categorizes the published literature on clinical maintenance optimization and then synthesizes it methodically.

This study highlights the significant issues relevant to the application of dependability analysis in healthcare maintenance, including the quantitative and qualitative criteria taken into account, data collection techniques and applied approaches to find the solution. Within each category, the gaps and further research needs have been discussed with respect to both an academic and industrial perspective.

It is worth mentioning that medical devices are becoming more and more numerous, various and complex. Although, they are often affected by environmental disturbances, sharp technological development, stochastic and uncertain nature of operations and degradation and the integrity and interoperability of the supportability system, the associated practices related to asset management and maintenance in healthcare are still lacking. Therefore, the literature review of applied based research on maintenance subject is necessary to reveal the holistic issues and interrelationships of what has been published as categorized specific topics.

The paper presents a comprehensive review that will be useful to understand the maintenance problem and solution space within the healthcare context.