Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 43 for “"hazard rate"”.
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Bias reduction in nonparametric hazard rate estimation
The need of improvement of the bias rate of convergence of traditional nonparametric hazard rate estimators has been widely discussed in the literature. Initiated by recent developments in kernel density estimation we distinguish and extend three popular bias reduction methods to the hazard rate …
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Limiting Conditional Distributions: Imprecision and Relation to the Hazard Rate
… context of survival analysis. We consider the hazard rate, a function which measures the risk of instantaneous failure of a system at time t conditioned on the system not having failed before t. It is well-known that the QSD leads to a constant hazard rate, and that the hazard rate generated by …
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Hazard rate models for early warranty issue detection using upstream supply chain information
… from warranty claims, the research proposes hazard rate models to link upstream supply chain information as explanatory covariates for early detection of warranty issues. For any upstream supply chain information without direct warranty claims history, we introduce Bayesian hazard rate models …
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The analysis of limit orders using the Cox proportional hazards model with independent competing risks
I apply the Cox proportional hazards model with independent competing risks to study the hazard rates of executed, cancelled, and partially executed limit orders submitted for Microsoft to the Island ECN for one day. The instantaneous probability of execution increases with decreases in the buy …
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Creditor coordination effects and bankruptcy prediction
… the increase in forecasting accuracy of hazard rate bankruptcy prediction models with creditor coordination effects over the forecasting period 1990-2009. A firm's probability of bankruptcy is likely to be marginally affected by creditors' coordination behavior, since failure to …
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The diffusion of health information technology: practice characteristics and competition as drivers of adoption
… a baseline logit model followed by three hazard rate models. In each case, clinic size is found to have positive though not significant effect on the probability of adoption (in the logit model) or to decrease the predicted time to adoption for the clinic (in the hazard rate models), being …
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Three Essays on Agricultural Trade Policy
… to which these SPS concern measures affect the hazard rate of US agri-food exports during the 1995-2016 period. Results show that SPS concern measures raise the hazard rate of US agri-food exports by a range of 2.1%~15.3%, causing the predicted hazard rate to increase from 21.8% to a range of …
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Essays in Economic Theory
… Poisson process, and the large firm has a higher hazard rate than the small firm. I find the unique sub-game perfect Nash equilibrium strategy for this game. At the equilibrium, the large firm will stay longer in the race, while the small firm will quit earlier. The large firm's optimal stopping …
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Birth spacing and child mortality in Mozambique : evidence from two demographic and health surveys
… using data from the 1997 and 2003 DHS. A log rate model for piecewise constant rates is applied. The piecewise hazard function assumes a constant hazard rate of child mortality in each 6 month category of the preceding birth interval. The negative binomial regression model is applied to …
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An Examination into Technological Timing Efforts: The Performance of Firms in the Personal Computer Industry
… we determine whether firms follow a consistent strategy in regards to when they time their entry into technological waves. Resulting performance implications of these actions are also measured. The theoretical underpinnings of this study lie at the intersection of the technology literature, the …
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On Logistic Regression Approach to Survival Data and Power Divergence Statistics for Life Tables
… logistic regression techniques to estimate hazard rates and survival curves from survival data. These techniques allow statisticians to use parametric regression modeling on survival data in a flexible way that provides both estimates and standard errors. In the first part of this thesis, …
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Using importance sampling to simulate queuing networks with heavy-tailed service time distributions
… within the parametrized class of delayed hazard rate twisted distributions of the service time. We run it on a M/G/1 queue with heavy-tailed service time distributions and show simulation gains of two orders of magnitude over direct simulation for a fixed confidence interval.
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Micro-econometric studies of how government programs affect labor supply and saving in Mexico
… financial access on low-income people saving rates and on different informal savings instruments. It considers an exogenous expansion of a Mexican savings institute that targets low-income people and uses the 1992 and 1994 National Surveys of Income and Expenditures. Results show that the …
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Improving Emergency Department Patient Flow Through Near Real-Time Analytics
… knowledge remains limited in regards to strategies and pragmatic approaches that actually improve patient flow in EDs. </p> <p>Motivated by the gaps in research, we develop a near real-time triage decision support system to reduce ED boarding and improve ED patient flow. The proposed system …
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Queueing Models for Large Scale Call Centers
… GI/GI/1+GI queue in heavy traffic which incorporates only the density the abandonment distribution at the origin, our result incorporate the entire abandonment distribution. This is accomplished by a scaling the hazard rate function of the abandonment distribution as the system moves into heavy …
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Semi-parametric models for response times and response accuracy in computerized testing
… modeling. They are 1. Hierarchical proportional hazard model: This model adopts the hierarchical structure suggested by van der Linden (2007) with the well-known Cox proportional hazard (PH) model in survival analysis. The PH model is comprised of two parts: the non-parametric baseline hazard and …
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Complexity and fragility: an assessment of New Zealand trade relations
… emerging methodologies. It consists of five separate but interconnected studies, of which one is published, one is under review, and two are about to be submitted to academic journals for publication. The first study provides an overview of New Zealand’s participation in GVCs and identifies the …
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Towards Efficient and Robust Caching: Investigating Alternative Machine Learning Approaches for Edge Caching
… challenges by implementing a learning-based strategy grounded in Hazard Rate ordering, a concept originally used to establish cache performance upper bounds. By employing a lightweight supervised machine learning model, HR-Cache learns from HR-based caching decisions and predicts the …
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A Dynamic Correlation Model for Pricing Credit Derivatives in A Lattice Framework
… one to specify rich dynamic structures for the hazard rates during the portfolio credit derivative pricing. Particularly, a specific bi-variate process has been handled by the operator method to tackle the challenge of calculating joint transition probabilities for the bi-variate process. The …
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The Influence of Diversity on Government Durations in Parliamentary Systems
… across 12 countries and applied Cox proportional-hazard modeling to examine the relationships between age and education and the duration of governments in parliamentary systems. The independent variables were age and education level for members of parliamentary governments across central Europe. …
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