This thesis investigated the cost-effectiveness of a 12-month supervised aerobic walking program with or without a behavioural intervention and an educational pamphlet, compared to an unsupervised/self-directed educational pamphlet intervention, among individuals with moderate osteoarthritis (OA) of the knee. Analyses included an economic evaluation to assess the cost effectiveness of the two walking interventions from both the societal and Canadian provincial/territorial health care payer perspectives. A value of information analysis exploring the potential value of future research was also performed. Results revealed that the unsupervised/self-directed intervention was the most cost-effective approach given that it cost the least to implement and participants had higher quality-adjusted life years (QALYs). Walking, either supervised in a community setting, or unsupervised in a setting such as the home, may be a favourable non-pharmacological option for the management of OA of the knee. The thesis concludes with a policy discussion relating to the funding of non-pharmacological therapies.

Location-specific amenities have been shown to play an increasingly important role in individual migration decisions. The role certain amenities play in the location decisions of the highly educated may be the cause of persistent regional differences in certain types of human capital, and consequently in regional productivity. This dissertation examines the determinants of the location decisions of new Ph.D. recipients in science and engineering (S&E). A discrete choice random utility model of the city location decisions of new Ph.D.s is developed to estimate preferences for city attributes as well as willingness to pay for improved amenity quality. By estimating the value Ph.D.s place on various urban amenities, the results of this research help inform policymakers as to their ability (or inability) to attract and retain highly educated workers to their region through public investment in amenity quality. To link the choice of city with the geographic attributes of cities, a unique micro dataset is used which reports the planned employment city location of S&E Ph.D. recipients in the U.S. at the time of degree. The primary data comes from the 1997-1999 Survey of Earned Doctorates (SED), administered by Science Resources Statistics of the National Science Foundation. The SED is given to all new doctorate recipients in the U.S. at or near the time of degree, and has a response rate over 90%. The application focuses on approximately 23,000 new Ph.D.s who received their degree in one of twelve S&E fields during the period 1997-1999, and who had made a definite commitment to an employer in a known U.S. metropolitan area. The results consistently suggest that natural amenities, such as summer or winter temperatures, play a larger role in the location decisions of new S&E Ph.D.s than reproducible amenities, such as crime or air quality. The implication is that policymakers have only a limited ability to improve the composition of their workforce through amenity investment. The results also indicate that the influence of amenities on location choice is related to a number of observable characteristics such as age, race, marital status, citizenship, and Ph.D.s’ previous migration behavior.

ISO 9000 Quality Management Standards Series aims to improve the products and services regarding customer satisfaction. The main purpose is to increase quality. On the other hand, having a special importance to mining, OHSAS 18000 Occupational Health and Safety Assessment System Series aims to provide safer, more tranquil and more healthy working environment to the labors. Both of these management systems are continuously improved and increase their importance in the world. This study evaluates ISO 9000 and OHSAS 18000 series in a comparative and criticizing scope and complementariness of the standards to each other is examined. Existing conditions in our country are determined in mining perspective and some comments are given to improve existing condition. Literatural information is given about both of the series in the study and these information is supported by some case studies. Case studies covers not only, a leading company in Turkey namely MANGAN Marble &amp / Granite Inc. but also some other companies and establishments. Studies show that there are some problems observed in the implementation of both series. The main problem is commitment of the top management. Other problems are documentation and training of the personnel. These problems are more serious in small scale mining companies and quarries. Although existance of these problems is highly possible in the mining companies applying ISO 9000 and OHSAS 18000 series are very beneficial regarding the increase in the quality of products and therefore it&amp / #65533 / s advantages and in providing a healthy and safe working environment and become a necessity.

The purpose of this research was, in order to forestall future failures of foresight, to provoke those responsible for risk governance into new ways of thinking through a greater exposure to and understanding of the body of existing academic knowledge. The research, which focused on the scholarship of application, synthesised the existing knowledge into a ―coherent whole‖ in order to assess its practical utility and to examine what is to be learnt about existing knowledge by trying to use it in practice. The findings are in two parts. The first focuses on how one ―thinks about thinking‖ about an issue. Early work identified three issues that were seen as being central to the understanding of risk governance. The first is the concept of risk itself, the second is to question whether there is a single paradigm used and the third is what is meant by the term ―risk indicator‖. A ―coherent whole‖, structured around seven-dimensions, was created from the range of definitions used within existing literature. No single paradigm was found to be used when discussing risk issues. Three paradigms were identified and labelled ―Line‖, ―Circle‖ and ―Dot‖. It was concluded that Risk Indicators were used to performance manage risk mitigation barriers rather than as a mechanism by which organisations may identify emerging risks. The second focus was the synthesis of academic work relevant to risk governance. It produced a list of statements which encapsulated the concerns of previous writers on this subject. The research then operationalised the issues as questions, which were seen to have practical utility. The elements of the ―coherent whole‖ suggest a way to provide access into the original research. The research suggests that it is unlikely that practitioners would wish to access the original research in its academic format. Further work therefore needs to be done to present the original work in a format that is more digestible to the practitioner community if it is to be used effectively. The results of this research are considered to be preliminary. No claim is being made that these questions are definitive. The research is however addressing an area which is of concern to those in practice and has not been previously examined.

This thesis contains three essays. In the first essay, I provide new evidence on the failure of the Q theory of investment. The Q theory implies the state-by-state equivalence of stock returns and investment returns. However in the data, I find that investment and stock returns are negatively correlated. I also show that a production economy with time-to-build can explain these empirical facts. When I compute Q theory based investment returns on simulated data of the time-to-build model, they are uncorrelated with simulated stock returns, as in the data. Moreover, the model replicates the empirical negative correlation between stock returns and investment growth which some researchers have interpreted as evidence for irrational markets. In the second essay, I analyze the equilibrium effects of investment commitment on asset prices when the representative consumer has Epstein-Zin utility. Investment commitment captures the idea that long-term investment projects require not only current expenditures but also commitment to future expenditures. The general equilibrium effects of investment commitment and Epstein-Zin preferences generate endogenously time-varying first and second moments of consumption growth and stock returns. As a result, the first and second moments of excess returns are endogenously counter-cyclical, excess returns are predictable, and the equity premium increases by an order of magnitude. This paper also offers novel empirical findings regarding the predictability of returns. In the real and simulated data, the lagged investment rate helps to forecast the mean and volatility of returns. In the third essay, we embed a structural model of credit risk inside a consumption based model, which allows us to price equity and corporate debt in a single framework. Our key economic assumptions are that the first and second moments of earnings and consumption growth depend on the state of the economy which switches randomly, creating intertemporal risk, which agents prefer to resolve quickly because they have Epstein- Zin-Weil preferences. Our model generates co-movement between aggregate stock return volatility and credit spreads, consistent with the data, and potentially resolves the equity risk premium and credit spread puzzles.

Existing QoS-aware Web Services discovery architectures tend to focus solely on fulfilling the requirements of either the client or the provider. However, the interests of the provider and client are not equivalent. The provider’s goal is to maximize the profit and consume the least amount of resources. On the other hand, the client’s selection is determined by their own requirements which do not always reflect the real resource overheads. This research aims to provide a novel mobile Web Services discovery and selection method based on utility functions to balance the requirements for clients and providers. In the mobile environment, it is critical to conserve resource consumption in addition to fulfilling user requirements, as resources such as wireless network bandwidth and mobile device power are precious. The proposed service selection strategy enables service providers to balance the cost/performance ratios and utilize the network bandwidth more effectively, while the clients can still attain the functional and quality levels specified in the service request.

The behavioral properties shown by people when they make selections between different choices will be studied. Based on empirical and logical data a mathematical axiomatic model is built. D. Luce is a major contributor in this area. This thesis is based on his works and those of his many co-authors. Three approaches will be considered that lead to the rank-dependent utility representation of binary gambles composed only of gains (losses) relative to a status quo. The proofs involve the theory of functional equations which is a very powerful tool giving the precise numerical representations.

Existing QoS-aware Web Services discovery architectures tend to focus solely on fulfilling the requirements of either the client or the provider. However, the interests of the provider and client are not equivalent. The provider’s goal is to maximize the profit and consume the least amount of resources. On the other hand, the client’s selection is determined by their own requirements which do not always reflect the real resource overheads. This research aims to provide a novel mobile Web Services discovery and selection method based on utility functions to balance the requirements for clients and providers. In the mobile environment, it is critical to conserve resource consumption in addition to fulfilling user requirements, as resources such as wireless network bandwidth and mobile device power are precious. The proposed service selection strategy enables service providers to balance the cost/performance ratios and utilize the network bandwidth more effectively, while the clients can still attain the functional and quality levels specified in the service request.

John Stuart Mill’s Representative Government argues that the ideal form of government is representative. In this paper, I interpret Mill’s argument as a utilitarian argument for a political system with the salient feature of authoritative public participation. Mill argues for this feature in the first three chapters of Representative Government. This argument is interpreted in the context of Mill’s utilitarian views as elaborated in Utilitarianism, with emphasis on Mill’s understanding of pleasure formation and high quality utility.

The behavioral properties shown by people when they make selections between different choices will be studied. Based on empirical and logical data a mathematical axiomatic model is built. D. Luce is a major contributor in this area. This thesis is based on his works and those of his many co-authors. Three approaches will be considered that lead to the rank-dependent utility representation of binary gambles composed only of gains (losses) relative to a status quo. The proofs involve the theory of functional equations which is a very powerful tool giving the precise numerical representations.