Indian Institute of Management Ahmedabad

About: Indian Institute of Management Ahmedabad is a education organization based out in Ahmedabad, India. It is known for research contribution in the topics: Emerging markets & Population. The organization has 1828 authors who have published 4011 publications receiving 59269 citations. The organization is also known as: IIMA & IIM Ahmedabad.

An innovative super-efficiency data envelopment analysis, semi-variance, and Shannon-entropy-based methodology for player selection: evidence from cricket

Abstract: The increasing interest in club cricket and online fantasy cricket league games raises the importance of player selection from the perspective of financial and sports performance. Most previous studies focus only on player efficiency and ignore consistency and the player’s importance in a team strategy. This scenario motivates us to design a holistic player selection method based on a player’s efficiency, consistency, and importance in a team strategy. For efficiency measurement, we apply a modified data envelopment analysis (DEA) method, namely, the non-increasing return-to-scale ‘super-efficiency DEA model,’ that provides improved results compared with the conventional Banker, Charnes, and Cooper DEA model in the presence of a higher number of efficient players. We design a modified consistency index based on the semi-variance approach. Unlike the existing methods that apply a player-specific reference frame to capture variability, we use a common reference frame that calculates the consistency in a more effective manner. We aggregate different consistency indices into a single consistency index using Shannon’s entropy concept and introduce a novel ‘value index’ to determine player importance, which can also be used as an indirect measure of the player’s fitness level. Finally, we design a player performance index by aggregating the efficiency and consistency scores using the Shannon-entropy method and incorporating the value index. We perform a rigorous numerical analysis to determine the all-time best one-day international Cricket XI team for the time span of January 5, 1971 to March 29, 2015. Next, we explain the advantages as well as rationale behind the improvement in the proposed measures compared with the existing methods and highlight the key insights. Finally, we perform a comparative analysis of the proposed team, the team announced by the ICC in 2011, and the team announced by the BBC in 2015.

Invariant features of spatial inequality in consumption: The case of India

Abstract: We study the distributional features and inequality of consumption expenditure across India, for different states, castes, religion and urban–rural divide. We find that even though the aggregate measures of inequality are fairly diversified across states, the consumption distributions show near identical statistics, once properly normalized. This feature is seen to be robust with respect to variations in sociological and economic factors. We also show that state-wise inequality seems to be positively correlated with growth which is in accord with the traditional idea of Kuznets’ curve. We present a brief model to account for the invariance found empirically and show that better but riskier technology draws can create a positive correlation between inequality and growth.

Technical Call Centres: Beyond 'Electronic Sweatshops' and 'Assembly Lines in the Head'

Abstract: Views on call centres as work systems represent a dichotomy. While, on the one hand, call centres are seen as conforming to an engineering or mass service model, on the other hand, they are described as high commitment service organizations. Technical call centres, studied as part of a larger qualitative study on experiences of working in call centres, back offices and medical transcription in Mumbai and Bangalore, India, were found to resemble high commitment service organizations. Task complexity, variety and autonomy were distinguishing factors in technical call centre jobs, the presence of which promoted employee well-being and satisfaction. At the same time, the emotional labour required by front-line service work remained an important part of the job profile. The emergence of cross-cultural interactions in call centre work, stemming from the contemporary outsourcing trend, is highlighted.

Change point estimation in non-monotonic aging models

Abstract: The problem of estimating change points in various non-monotonic aging models is considered. A general methodology for consistent estimation of the change point is developed and applied to non-monotonic aging models based on the hazard rate function as well as on the mean residual life function.

Detecting Data Flow Errors in Workflows: A Systematic Graph Traversal Approach

Abstract: When designing a workflow, it is customary practice to create the control flow structure first and to ensure its correctness Information about the flow of data is introduced subsequently into the workflow and its correctness is independently verified Improper specification of data requirements of tasks and XOR splits can cause problems such as wrong branching at XOR splits and the failure of tasks to execute Here we present a graph traversal algorithm called GTforDF for detecting data flow errors in a workflow that is free of control flow errors, and illustrate its operation on two realistic workflows with interconnected loops Our approach extends and generalizes data flow verification methods that have been recently proposed It also makes use of the concept of corresponding pairs lately introduced in control-flow verification It thus has the potential for development into a unified algorithmic procedure for the concurrent detection of control flow and data flow errors