Faculty & Research

Research Productive

Show result

Search Query :
Area :
Search Query :
2757 items in total found

Working Papers | 2009

Computing the probability mass function of the maximum flow through a reliable network

Megha Sharma and Diptesh Ghosh

In this paper we propose a fast state-space enumeration based algorithm called TOP-DOWN capable of computing the probability mass function of the maximum s-t flow through reliable networks. The algorithm computes the probability mass function in the decreasing order of maximum s-t flow values in the network states. This order of enumeration makes this algorithm attractive for commonly observed reliable networks, e.g., in telecommunication networks where link reliabilities are high. We compare the performance of the TOP-DOWN algorithm with a path-based exact algorithm and show that the TOP-DOWN algorithm solves problem much faster and is able to handle much larger problems than existing algorithms.

Read More

Working Papers | 2009

Information System for Brand-Variety Performance and Decisions: Study and Application for Cotton in India

Vasant P. Gandhi

Information on brand-variety performance is critical for small farmers in India since every year they need to make crucial decisions on which brand-variety seeds to plant. The livelihoods from their small farms and returns on all the inputs used depend critically on this decision. Yet no systematic information is available to them on this, and year after year the farmers are forced to decide based on guesses, hearsay and opinions which are frequently imperfect or even biased. Even companies and governments need to know about the actual performance of brand-varieties in different areas so as to be able to recommend correctly. Markedly, on the other hand, official crop-cutting surveys for estimation and assessment of actual yields are a regular feature of all states, and they also record some information regarding the inputs used including the brand-variety. However, the information is never examined from this point of view. Cotton is a major cash crop in India but has substantial problems particularly from extensive pest damage and poor yields. Brand-variety performance varies substantially and poor decisions frequently lead to crop failures and farmer suicides. A study was done on the performance of cotton varieties through a survey across four major Indian states and 694 farmers, covering pest resistance, inputs, yields, quality, price, value of output, cost of cultivation, and profits. This brought out the features and variations, and on this foundation, a brand-variety performance information system is proposed which would draw upon information from the regular crop-cutting surveys, collate it, analyze it, and make findings available to the farmers. This would help provide correct information and advice to farmers over diverse agro-ecological settings. Through this, the farmers would be able to make better informed brand-variety decisions, which would help reduce crop failures and risks and improve farm performance and incomes.

Read More

Working Papers | 2009

Evaluating Downside Risks in Reliable Networks

Megha Sharma and Diptesh Ghosh

Reliable networks are those in which network elements have a positive probability of failing. Conventional performance measures for such networks concern themselves either with expected network performance or with the performance of the network when it is performing well. In reliable networks modeling critical functions, decision makers are often more concerned with network performance when the network is not performing well. In this paper, we study the single-source single-destination maximum flow problem through reliable networks and propose two risk measures to evaluate such downside performance. We propose an algorithm called COMPUTE-RISK to compute downside risk measures, and report our computational experience with the proposed algorithm.

Read More

Working Papers | 2009

Organizing the un-Organized? The Rise, Recession and Revival of the Indian Diamond Industry

Rao Indu

The Indian diamond industry thrives in the atmosphere of secrecy and informality that envelops the diamond trade and has for long been labeled as an unorganized sector of the economy. However, it resembles a close-knit community composed of thousands of small, medium and large sized CPD ( cut and polished diamonds) units and has grown to become one of the highest foreign exchange earners for the country. The industry exports cut and polished diamonds worth US $ 14 billion annually and enjoys a 95 % market share of the global exports of cut and polished diamond pieces. An in-depth study of the industry reveals that the so called unorganized sector is in fact highly organized and has great potential to offer useful insights to the field of management in terms of new forms of organizing, networking, business processing and for doing international business. This paper presents summary of findings from research conducted in the Indian diamond industry over a period of last four years. Part I includes insights about the remarkable rise, growth and the unique working of the industry. Part II makes use of a case study of a 40 years old large- sized CPD unit to help gain further understanding of the Indian diamond industry. Part III is about the impact of the 2008 global turmoil and of the industry's revival after a severe recession. The analysis of findings and implications for future research have been discussed.

Read More

Working Papers | 2009

Encouraging Cooperation in Ad-hoc Mobile-Phone Mesh
Networks for Rural Connectivity

Kavitha Ranganathan and Vikramaditya Shekhar

This paper proposes a rating based scheme for encouraging user participation in ad-hoc mobile phone mesh networks. These networks are particularly attractive for remote/rural areas in developing countries as they do not depend on costly infrastructure and telecom operators. We evaluate our scheme using extensive simulations and find that our proposed scheme is successful in enhancing the network throughput.

Read More

Working Papers | 2009

Analysis of Non Suburban Passenger Coaching Stock Utilization

G. Raghuram, Digar Rishita, and Jain Chandni

In 2007-08, Indian Railways (IR) carried 6.5 billion passengers (highest in the world as a single system, and second highest in the world as a country after Japan at 9.0 billion passengers), serviced 770 billion passenger kms (second highest in the world, close to China at 773 billion passenger kms) and passenger earnings were Rs 19,783 crores. Of this, 43% of the passengers, 84% of the passenger kms and 92% earnings were from the non suburban sector.

The actual passenger kms for 2007-08 was higher than the capacity of the IR. Such overuse can be reduced by increasing the coaching stock, or by improving the utilization of coaches. The former method proves to be an expensive one for IR. Hence, this calls for an improvement in the coaching stock utilization.

In this paper, we assess the utilization of coaches on the parameters % of runtime, kms/day, and average speed of rakes servicing express/mails and passenger trains in the South Central Railway (SCR), taking into consideration the rake linking involved. This is done by analyzing every rake link used in the SCR as given in their rake link booklet.

Read More

Working Papers | 2009

The Behavioral Equivalence of Organizational Culture

Rao Indu

Three decades of organizational cultural (OC) studies have seen change in both content and emphasis. This paper presents findings from an extensive review of literature on OC and highlights the relevance of OC with respect to individual, organizational, intra-organizational, industry and external environment related variables. The concept of organizational culture (OC) has traditionally focused on values and beliefs and has been considered to be relatively stable and enduring. But literature is less sanguine about the reciprocal evolution of culture through behaviors. This paper presents a behavioral perspective on OC and contributes to its emerging dynamic aspect. A behavioral model of OC is suggested and propositions are drawn to explain the dynamics involved.

Read More

Working Papers | 2009

Fertilizer Subsidy in India: Who are the Beneficiaries?

Vijay Paul Sharma and Hrima Thaker

Agricultural subsidies that encourage production and productivity have been widely criticized because of the cost of subsidies and they are perceived to be far from uniformly distributed. There is a general view in academic, policy and political circles that agricultural subsidies are concentrated geographically, they are concentrated on relatively few crops and few producers and in many cases do not reach the targeted group(s). One of the most contentious issues surrounding input subsidies in general and fertilizer in particular in India is how much of what is paid out actually finds its way into the pocket of the farmer, and how much is siphoned away by the input companies. There has also been a debate about the issue of real beneficiaries of fertilizer subsidy like small vs. large farmers, well-developed vs. less developed regions, etc. Therefore, there is need to understand the fertilizer subsidy distribution pattern to assess whether the subsidy benefits the target group(s), an argument often made while giving any farm subsidy. This paper examines trends in fertilizer subsidy and the issue of distribution of fertilizer subsidies between farmers and fertilizer industry, across regions/states, crops and different farm sizes. The study shows that fertilizer subsidy has increased significantly in the post-reforms period from Rs. 4389 crore in 1990-91 to Rs. 75849 crore in 2008-09. As a percentage of GDP, this represents an increase from 0.85 per cent in 1990-91 to 1.52 per cent in 2008-09. The paper shows that general perception that about one-third of fertilizer subsidy goes to fertilizer industry is misleading because the underlying assumptions (i) that India's entry into world market as an importer does not affect world prices, and (ii) world fertilizer markets are perfectly competitive, do not hold true. The world fertilizer trade-flows and markets are more concentrated and volatile and imports by India have significant impact on world prices. Moreover, with shift from the earlier cost-plus based approach to import parity pricing (IPP), the Indian fertilizer industry would be exposed to the world competition and efficient units would survive. Therefore, the proposed policy of direct transfer of fertilizer subsidy to farmers is misconceived and inappropriate and its adverse effects outweigh the perceived benefits of it. The study shows that fertilizer subsidy is more concentrated in few states, namely, Uttar Pradesh, Andhra Pradesh, Maharashtra, Madhya Pradesh, and Punjab. Inter-state disparity in fertilizer subsidy distribution is still high though it has declined over the years. Rice is the most heavily subsidized crop followed by wheat, sugarcane and cotton. These four crops account for about two-third of total fertilizer subsidy. The study highlights the existence of fair degree of equity in distribution of fertilizer subsidy among farm sizes. The small and marginal farmers have a larger share in fertilizer subsidy in comparison to their share in cultivated area. A reduction in fertilizer subsidy is, therefore, likely to have adverse impact on farm production and income of small and marginal farmers as they do not benefit from higher output prices but do benefit from lower input prices. This paper justifies the fertilizer subsidies and questions the rationale for direct transfer of subsidy to farmers.

Read More

Working Papers | 2009

Role of Universal Service Obligation Fund in Rural Telecom Services: Lessons from the Indian Experience

Rekha Jain and G. Raghuram

Despite the tremendous growth of mobile services in most developing countries, these have largely remained limited to urban areas. This has further aggravated the existing urban and rural divide. Policy makers and regulators perceive the need for an effective regulatory and policy environment to reduce the gap, as there are several market challenges in this endeavor, including low commercial viability. However, most such interventions have had little success.

This paper outlines India.s experience of increasing rural teledensity, including its recent policy initiative to increase penetration through creation of a Universal Service Obligation Fund (USOF) that supported a variety of innovative initiatives. USOF.s most ambitious program to date had been the design and deployment of mobile services in rural areas.

This paper analyses the outcomes of various programs, especially those of the mobile service provision component of USOF. Despite the innovative design of the USOF program, it had little impact on increasing rural teledensity. On the other hand, positive policy steps that reduced the costs for service provision (revenue shares, duties, ADC) and competition facilitated greater rural penetration. This raises the issue of role of government vis-à-vis private sector in increasing rural teledensities.

The lack of accountability arising from the relationship between the government owned incumbent and the USOF administrator and proper evaluation of USOF, the non-ring fencing of the fund and poor quality project management contributed to the low impact. Non-involvement of private operators at an early stage, inability to suitably enforce any penalties for violation of contracts, and non-existent review and feedback mechanism have not allowed USOF to leverage the benefits of an early start. In Peru, strict penalties in non implementation of contracts led to more timely schedules (Cannock, 2001).

Since USOF is a highly visible program, it is important to generate high impact outcomes. On the strategic front, USOF needs to be managed by an independent body that is made responsible for outcomes. Third party assessments and greater enforceability of contracts are necessary operational elements of thisdesign. Without this operational framework, the strategic elements of design will not provide the value that was envisaged.

This paper also provides a framework for assessment of USOF and relates it to the experience in other countries. USOF must be treated as one among many instruments for increasing rural teledensities and efforts should be made to facilitate policy outcomes on a variety of dimensions.

Read More

Working Papers | 2009

A Study of Referral System for EmOC in Gujarat

Mona Gupta, Dileep Mavalankar, and Poonam Trivedi

Referral System for Emergency Obstetric Care in Gujarat State

Background- An effective referral system is an essential prerequisite for a well functioning Emergency Obstetric Care (EmOC) service. It is the link between the home of the mother and a well equipped facility. The study attempts to explore the crucial link of referral system between the primary and higher level facilities.

Objective- To study the existing referral system for emergency obstetric care in the state of Gujarat, evaluate its strengths and weaknesses, and suggest ways of improvement for providing better referral service.

Methodology- Based on the RCH (Reproductive and Child Health) status and geographical location, 2 districts each were chosen from good, medium and poor districts. Primary data was collected through visits to facilities and through interviews of key informants at state, division, and district level. The recent Public Private Partnership (PPP) with Emergency Management Research Institute (EMRI) and its impact on the existing referral system was also studied. Secondary data was collected through state and district health management information system. A desk review of available research literature on studies on referral system was also carried out.

Results- The study revealed a rudimentary government referral transport system. The focus of the system is more on number of ambulance and drivers, and less on the number of referrals provided. Most of the PHCs do not have proper ambulances. The lack of standard procedure and referral protocols in the government facilities were aggravated by absence of records related to referrals. The availability of vehicle for transport is improving with the advent of EMRI; however there is a greater need for transparency in its processes and data.

Conclusion- By giving due importance to EmOC referral system and treating it as an integral part of maternal health, many more lives of mothers can be saved. The referral system and transport should focus on the requirements of the patients. Public Private Partnership can be one of the options for providing transport but ultimate responsibility of providing quality services rests with the government.

Read More
IIMA