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821 items in total found

Journal Articles | 2018

Solving semi-open queuing networks with time-varying arrivals: An application in container terminal landside operations

Vibhuti Dhingra, Govind Lal Kumawat, Debjit Roy, and René De Koster

European Journal of Operational Research

Semi-open queuing networks (SOQNs) are widely applied to measure the performance of manufacturing, logistics, communications, restaurant, and health care systems. Many of these systems observe variability in the customer arrival rate. Therefore, solution methods, which are developed for SOQNs with time-homogeneous arrival rate, are insufficient to evaluate the performance of systems which observe time-varying arrivals. This paper presents an efficient solution approach for SOQNs with time-varying arrivals. We use a Markov-modulated Poisson Process to characterize variability in the arrival rate and develop a matrix-geometric method (MGM)-based approach to solve the network. The solution method is validated through extensive numerical experiments. Further, we develop a stochastic model of the landside operations at an automated container terminal with time-varying truck arrivals and evaluate using the MGM-based approach. Results show that commonly used time-homogeneous approximation of time-varying truck arrivals is inaccurate (error is more than 15% in expected waiting time and expected number of trucks waiting outside the terminal) for performance evaluation of the landside operations. The application results are insightful in resource planning, demand leveling, and regulating the number of trucks permitted inside the terminal.

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Journal Articles | 2018

Does implementing problem-solving projects affect decisional style? Developing governance capabilities in school management committees

Vijaya Sherry Chand and Ketan Satish Deshmukh

Journal of Development Effectiveness

Faith in the power of local decision-making underpins decentralised democratic governance, but the evidence for its effectiveness is mixed. It is in this context that school management committees (SMCs) were established in 2009–10 in India. Training these SMCs received has been criticised for focusing only a set of high expectations built around an idealised set of roles and responsibilities, and not on the members’ decision-making capabilities. We describe how problem-solving projects can be employed to develop such capabilities, through a field experiment in 50 SMCs, with another 50 serving as controls, that studied decisional styles of 603 SMC members. The analysis was based on a confirmatory factor analysis of a two-factor (vigilant and maladaptive styles) model, with the variation among SMCs controlled through a two-level model and path analysis. There was a significant positive effect on the vigilant decision-making style of those who participated in the programme (β = 0.195, p < .05), though maladaptive styles increased in both the treatment and control groups. Given that SMCs are expected to remain a feature of local governance structures, the importance of functional partnerships between the SMCs and school principals is indicated.

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Journal Articles | 2018

Role of psychological empowerment in the relationship between structural empowerment and innovative behavior

Manjari Singh and Anita Sarkar

Management Research Review

Purpose

The purpose of this paper is to empirically test the relationship between the empowering structure and the employees’ innovative behavior and the role of psychological empowerment in mediating this link.

Design/methodology/approach

Structural equation modeling was used to analyze data from 401 female primary school teachers in India. Prior to the main study, the scales were tested on a sample of 288 teachers. While psychological empowerment and structural empowerment were based on the self-reporting by the teachers, the innovative behavior of the teacher was assessed by two to three colleagues for each teacher.

Findings

The results confirmed that structural empowerment leads to innovative behavior and psychological empowerment and partially mediates the relationship between structural empowerment and innovative behavior.

Practical implications

Promising ideas die down because of lack of proper resource support and a free flow of information exchange despite employees’ willingness to carry out innovative tasks. Psychological empowerment affects creative intention in the workplace and can play a critical role for employees at their workplace.

Social implications

In the context of development at the teacher and school levels, it is imperative to address both the psyche of the individual and the existing structure in schools.

Originality/value

This study makes two critical contributions. One, it emphasizes the importance of structural empowerment in ensuring innovative behavior of employees. Two, it also brings forward the importance of psychological empowerment in the relationship between structural empowerment and innovative behavior.

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Journal Articles | 2018

Underlying determinants of health provider Ccoice in urban slums: Results from a discrete choice experiment in Ahmedabad, India

Vilius Cernauskas, Federica Angeli, Anand Kumar Jaiswal, and Milena Pavlova

BMC Health Services Research

Background:

Severe underutilization of healthcare facilities and lack of timely, affordable and effective access to healthcare services in resource-constrained, bottom of pyramid (BoP) settings are well-known issues, which foster a negative cycle of poor health outcomes, catastrophic health expenditures and poverty. Understanding BoP patients’ healthcare choices is vital to inform policymakers’ effective resource allocation and improve population health and livelihood in these areas. This paper examines the factors affecting the choice of health care provider in low-income settings, specifically the urban slums in India.

Method:

A discrete choice experiment was carried out to elicit stated preferences of BoP populations. A total of 100 respondents were sampled using a multi-stage systemic random sampling of urban slums. Attributes were selected based on previous studies in developing countries, findings of a previous exploratory study in the study setting and qualitative interviews. Provider type and cost, distance to the facility, attitude of doctor and staff, appropriateness of care and familiarity with doctor were the attributes included in the study. A random effects logit regression was used to perform the analysis. Interaction effects were included to control for individual characteristics.

Results:

The relatively most valued attribute is appropriateness of care (β=3.4213, p = 0.00), followed by familiarity with the doctor (β=2.8497, p = 0.00) and attitude of the doctor and staff towards the patient (β=1.8132, p = 0.00). As expected, respondents prefer shorter distance (β= − 0.0722, p = 0.00) but the relatively low importance of the attribute distance to the facility indicate that respondents are willing to travel longer if any of the other statistically significant attributes are present. Also, significant socioeconomic differences in preferences were observed, especially with regard to the type of provider.

Conclusion:

The analyses did not reveal universal preferences for a provider type, but overall the traditional provider type is not well accepted. It also became evident that respondents valued appropriateness of care above other attributes. Despite the study limitations, the results have broader policy implications in the context of Indian government’s attempts to reduce high healthcare out-of-pocket expenditures and provide universal health coverage for its population. The government’s attempt to emphasize the focus on traditional providers should be carefully reconsidered.

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Journal Articles | 2018

When are rewards bad for innovation? Leaders as catalysts for positive linkages between work motivation and innovation

Vishal Gupta

WorldatWork Journal

Building on the foundations of self-determination theory of motivation, the present study investigates the association between leader behaviors, autonomous motivation and employee innovativeness (innovative work behavior and innovation outcomes) in the Indian R&D context. Data were collected from 493 scientists working in Indian R&D organizations and structural equation modeling was used to test the hypothesized relationships between the study variables. The study found evidence for positive relationships between intrinsic motivation, integrated extrinsic motivations, and employee innovative work behavior and innovation outcomes. While extrinsic motivation is always considered to be negative and harmful for innovation, the present study shows that integrated extrinsic motivation has characteristics similar to intrinsic motivation and can be conducive for promoting innovative work behaviors and innovative outcomes. Extrinsic motivation (driven only by financial rewards) was negatively related to both innovative work behaviors and innovative outcomes. Leadership was positively related to intrinsic motivation, integrated extrinsic motivation and innovative work behaviors, but not to extrinsic motivation and innovative outcomes. Implications for theory and practice are discussed.

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Journal Articles | 2018

Leadership competencies for effective public administration: a study of Indian Administrative Service officers

Vishal Gupta, Sanjeev Chopra, and Ram Kumar Kakani

Journal of Asian Public Policy

Public administrative service occupies a strategic position in the public governance system of any nation. Contemporary public administration needs competent public managers who are able to make sense of the ambiguity inherent in the job. This study presents an attempt to identify important competencies needed for public administrators (specifically District Magistrates in India, a peak leadership role in the public service). Based on focused-group discussions and a survey of 218 Indian Administrative Service officers, the study identified eight competencies, namely people first; leading others; integrity; decision-making; planning, coordination and implementation; problem-solving; self-awareness and self-control; and innovative thinking. The eight competencies were further clubbed under four meta-competencies, namely stakeholder analysis and decision-making, managing change and innovation, team building and positive administrator personality. A detailed description of the behaviours included within each competency and meta-competency is provided. Implications for theory and practice are discussed.

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Journal Articles | 2018

Internet search engines and two-sided markets: Implications for antitrust analysis

Viswanath Pingali

Economic & Political Weekly

Internet search engines provide a vital platform for various groups to interact and create value. On the one hand, they help users find answers to their search queries, and on the other, search engines monetise their free search services by selling advertisements to connect potential buyers with sellers. An exploration of the economics of search markets is presented along with a discussion about the economic literature on two (multi)-sided markets. There is also a discussion of issues with the developments in the antitrust case pertaining to Google in India.

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Journal Articles | 2018

Looking under the hood: A comparison of techno-economic assumptions across national and global integrated assessment models

Volker Kreya, Fei Guo, Peter Kolpa, Saritha S. Vishawnathan, and Amit Garg

Energy

Integrated assessment models are extensively used in the analysis of climate change mitigation and are informing national decision makers as well as contribute to international scientific assessments. This paper conducts a comprehensive review of techno-economic assumptions in the electricity sector among fifteen different global and national integrated assessment models. Particular focus is given to six major economies in the world: Brazil, China, the EU, India, Japan and the US. The comparison reveals that techno-economic characteristics are quite different across integrated assessment models, both for the base year and future years. It is, however, important to recognize that techno-economic assessments from the literature exhibit an equally large range of parameters as the integrated assessment models reviewed. Beyond numerical differences, the representation of technologies also differs among models, which needs to be taken into account when comparing numerical parameters. While desirable, it seems difficult to fully harmonize techno-economic parameters across a broader range of models due to structural differences in the representation of technology. Therefore, making techno-economic parameters available in the future, together with of the technology representation as well as the exact definitions of the parameters should become the standard approach as it allows an open discussion of appropriate assumptions.

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Journal Articles | 2018

Uncertainty Handling in Bilevel Optimization for Robust and Reliable Solutions

Zhichao Lu, Kalyanmoy Deb, and Ankur Sinha

International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems

Uncertainties in variables and parameters cause optimization problems to move away from globally-optimal and uncertain solutions. Practitioners resort to finding robust and reliable solutions in such situations. Bilevel optimization problems involving a hierarchy of two nested optimization problems have received a growing attention in the recent past due to their relevance in practice. While a number of studies on bilevel solution methodologies and applications are available for a deterministic setup, but studies on uncertainties in bilevel optimization are rare. In this paper, we suggest methodologies for handling uncertainty in both lower and upper level variables that may occur from different practicalities. For the first time, we perform a systematic study demonstrating the effect of uncertainties in each level along with the definition of robustness and reliability in the context of bilevel optimization. The issues and complexities introduced due to such uncertainties are then studied through a number of test cases, for brevity, we only show results on three test cases. Finally, two real-world bilevel problems involving uncertainties in their variables are solved. The study provides foundations and demon- strates viable directions for further research in uncertainty-based bilevel optimization problems.

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Journal Articles | 2018

Does plant size matter? Differential effects of FDI on wages and employment?

Shruti Sharma

Asian Development Review: Studies of Asian and Pacific Economic issues

This paper examines the differential effects, based on the size of the plant, of industry-level foreign direct investment (FDI) on plant-level employment and the wages of skilled and unskilled workers in India's manufacturing sector. On average, there are strong positive differential effects of increased inward-level FDI for large plants relative to small and average-sized plants in terms of employment and the average wages of both skilled and unskilled workers. Small plants experience negative effects from inward FDI, which can be explained by intra-industry reallocation of output from smaller to larger plants. After conducting a regional analysis, I find positive spillovers to small plants in Indian states that receive large and persistent flows of FDI. This suggests that a critical mass of FDI is necessary for small plants to experience positive spillover effects.

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IIMA