1,395 research outputs found

    Load Balancing in the Smart Grid: A Package Auction and Compact Bidding Language

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    Distribution system operators (DSOs) are faced with new challenges from the continuous integration of fluctuating renewable energy resources and new dynamic customer loads such as electric vehicles, into the power grid. To ensure continuous balancing of supply and demand, we propose procurement package auctions to allocate load flexibility from aggregators and customers. The contributions of this research are an incentive-compatible load flexibility auction along with a compact bidding language. It allows bidders to express minimum and maximum amounts of flexibility along with unit prices in single bids for varying time periods. We perform a simulation-based evaluation and assess costs and benefits for DSOs and balancing suppliers given scenarios of varying complexity as well as computational aspects of the auction. Our initial findings provide evidence that load flexibility auctions can reduce DSO costs substantially and that procurement package auctions are well-suited to address the grid load balancing problem

    Co-ordination and Lock-in: Competition with Switching Costs and Network Effects

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    Switching costs and network effects bind customers to vendors if products are incompatible, locking customers or even markets in to early choices. Lock-in hinders customers from changing suppliers in response to (predictable or unpredictable) changes in effciency, and gives vendors lucrative ex post market power-over the same buyer in the case of switching costs (or brand loyalty), or over others with network effects. Firms compete ex ante for this ex post power, using penetration pricing, introductory offers, and price wars. Such "competition for the market" or "life-cycle competition" can adequately replace ordinary compatible competition, and can even be fiercer than compatible competition by weakening differentiation. More often, however, incompatible competition not only involves direct effciency losses but also softens competition and magnifies incumbency advantages. With network effects, established firms have little incentive to offer better deals when buyers’ and complementors’ expectations hinge on non-effciency factors (especially history such as past market shares), and although competition between incompatible networks is initially unstable and sensitive to competitive offers and random events, it later "tips" to monopoly, after which entry is hard, often even too hard given incompatibility. And while switching costs can encourage small-scale entry, they discourage sellers from raiding one another’s existing customers, and s also discourage more aggressive entry. Because of these competitive effects, even ineffcient incompatible competition is often more profitable than compatible competition, especially for dominant rms with installed-base or expectational advantages. Thus firms probably seek incompatibility too often. We therefore favor thoughtfully pro-compatibility public policy.

    Matching with Bundle Preferences: Tradeoff between Fairness and Truthfulness

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    Course assignment is a widespread problem in education. Often students have preferences for course schedules over the week. First-Come First-Served (FCFS) is the most widely used rule to assign students to courses in practice, but recent research led to alternatives with attractive properties. Bundled Probabilistic Serial (BPS) is a randomized mechanism satisfying ordinal efficiency, envy-freeness, weak strategy-proofness, and polynomial runtime. We report a first application of BPS in a large-scale course assignment application and discuss advantages over FCFS comparing a number of metrics such as the size, the average rank, the profile, and the popularity of the assignments. The exponential number of possible course schedules is a central problem in the implementation of combinatorial assignment mechanisms. We propose a new way to elicit preferences, which limits the number of parameters a student needs to provide. This yields a computationally very effective tool to solve course assignment problems with thousands of students in practice

    Understanding the role of supply chains in influencing health and safety at work

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    An exploration of New Institutional Economics for the strategic analysis of e-business with reference to transformational change

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    This research applies institutional economics theory to management challenges arising in connection with e-business related transformational change. The research was carried out in response to widely recognised problems in managing IT-enabled change in complex organisations. A cyclic approach builds researcher competence in both the chosen theory, New Institutional Economics (NIE), and its application through a series of four contrasting case studies. The case situations, which derive from the researcher’s work as a technology management consultant, are treated as action research experiments which investigate e-business related transformational change in financial services, retail and government settings. A constructivist stance is adopted within the case situations with the researcher acting as a participant observer. Reflective practice is used to improve the experimental method for the case studies through the course of the research, leading to the use of participatory action research (PAR) for the final case. A literature review of NIE shows it to be loosely defined as a theory, so an analytic NIE framework is created to provide a cognitive model. This model is then modified and extended to produce a final theoretical framework. In parallel, a conceptual map of NIE is created from the research as a practical aid to illustrate NIE concepts and linkages. These two models, the theoretical framework and the conceptual map, evolve through the four case situations which were selected from a range of e-business consulting opportunities available to the researcher over the period of the research. The second case study drives the main development of the two models and draws out the necessary and complementary contributions of both transaction cost economics (TCE) and agency theory (AT) as parts of NIE, neither of which is sufficient on its own. The final case study demonstrates application to practice. The overall sequence of case studies shows the researcher’s cognitive growth from being a novice in the theory and its application in the first case through to a level of proficiency in applying NIE to the rigours of e-business practice in the final case. The research makes several contributions to knowledge. It makes a significant methodological contribution by bringing research methods developed for other forms of professional practice to the management discipline. It also makes a significant contribution to theoretical knowledge. It develops two theoretical models of NIE – a conceptual map and a theoretical framework – which present a way of linking NIE concepts in a meaningful way, and a structure by which NIE can be used in the analysis of highly complex organisational situations. These models clarify the complementary roles of TCE and AT, and indicate a reason why so many studies limited to TCE alone have been inconclusive. Applying NIE to the rigours of e-business management produces, in turn, a contribution to IT strategy formulation. The research makes a practical contribution by showing how NIE can be applied to e-business practice, subject to a number of significant caveats. NIE, as a descriptive theory, is shown to provide a powerful conceptual framework when combined with PAR, although both require deep knowledge and skill. In particular, adopting PAR as a case study method depends on an experienced, skilled and committed practitioner for its effective use. Finally, the research finds that NIE’s strengths as a framework for strategic analysis of large scale and complex e-business situations involving transformational change, which make it unduly sophisticated for less challenging situations, mean that NIE is suited to use by highly skilled, specialist consultants rather than by general managers.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

    Supporting the Different Channels of Worker Representation

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    This rapid review synthesises the literature from academic, policy, and knowledge institution sources on the different channels to strengthen worker representation in low- and middle-income countries (LMICs). Most of the literature on worker representation (a way to increase workers’ voice) comes from high-income countries. Where relevant for LMICs, some of this literature is used in this rapid review. Evidence from LMICs, mainly comes from the more industrialised middle-income countries, mainly in Latin America, but also in South Africa, India and Bangladesh, while few evidence comes from low-income countries. Overall, the evidence that makes a ‘business case’ for worker representation shows that Trade union members have higher wages than non-union members through collective bargaining. Secondly, higher wages are often paid back through an increase in productivity at firm-level. It seems that effective employee engagement strategies (or meaningful participation) positively relates to affective organisational commitment and trust, which result in higher level of activity, initiative and responsibility. Thirdly, The literature shows strong research evidence of positive association between trade union supported health and safety representatives and improved health and safety outcomes in many sectors, in particular in high-income countries. Finally, Some scholars mention that the presence of strong unions reduce income inequality and that it was instrumental in maintaining democracy, economic order, and social stability in times of crises. Worker representation is also linked with more gender equality through the involvement of women in collective bargaining and other negotiations

    Mining for Change

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    For a growing number of countries in Africa the discovery and exploitation of natural resources is a great opportunity, but one accompanied by considerable risks. In Africa, countries dependent on oil, gas, and mining have tended to have weaker long-run growth, higher rates of poverty, and greater income inequality than less resource-abundant economies. In resource-producing economies, relative prices make it more difficult to diversify into activities outside of the resource sector, limiting structural change. Economic structure matters for at least two reasons. First, countries whose exports are highly concentrated are vulnerable to declining prices and volatility. Second, economic diversification matters for long-term growth. This book presents research undertaken to understand how better management of the revenues and opportunities associated with natural resources can accelerate diversification and structural change in Africa. It begins with chapters on managing the boom, the construction sector, and linking industry to the resource—three major issues that frame the question of how to use natural resources for structural change. It then reports the main research results for five countries—Ghana, Mozambique, Uganda, Tanzania, and Zambia. Each country study covers the same three themes—managing the boom, the construction sector, and linking industry to the resource. One message that clearly emerges is that good policy can make a difference. A concluding chapter sets out some ideas for policy change in each of the areas that guided the research, and then goes on to propose some ideas for widening the options for structural change
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