Search for dissertations about: "proportional hazard model"

Showing result 1 - 5 of 48 swedish dissertations containing the words proportional hazard model.

2. 1. The Analysis of Duration and Panel Data in Economics

   Author : Wolfgang Hess; Nationalekonomiska institutionen; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Monetary Exchange Rate Model; Homogeneity Testing; Panel Cointegration; Pooling; Duration of Trade; Unemployment Duration; Proportional Hazards; Unobserved Heterogeneity; Hazard Rate; Discrete-Time Duration Model; Threshold Excess Model;

   Abstract : This thesis is divided into two distinct parts. The first part contains three chapters dealing with the analysis of duration data from an econometric perspective and with application to trade durations. READ MORE

4. 2. Essays on the Assumption of Proportional Hazards in Cox Regression

   Author : Inger Persson; Kenneth Carling; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Informatics; computer and systems science; Proportional hazards; Cox regression; Proportionality assumption; Informatik; data- och systemvetenskap; Informatics; computer and systems science; Informatik; data- och systemvetenskap; statistik; Statistics;

   Abstract : This thesis consists of four papers about the assumption of proportional hazards for the Cox model in survival analysis. The first paper compares the hazard ratio estimated from the Cox model to an exact calculation of the geometric average of the hazard ratio when the underlying assumption of proportional hazards is false, i.e. READ MORE

5. 3. Essays on Shocks, Welfare, and Poverty Dynamics: Microeconometric Evidence from Ethiopia

   Author : Yonas Alem; Göteborgs universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; urban Ethiopia; poverty dynamics; dynamic probit; hazard rate; labor market status; subjective well-being; policymakers; life satisfaction; environment; Ethiopia; food price; consumer demand; fertilizer use; rainfall; highlands of Ethiopia; panel data; consumption; welfare; food price shock; Africa;

   Abstract : Five self-contained papers constitute this thesis. Paper 1: Does fertilizer use respond to rainfall variability? Panel data evidence from urban Ethiopia In this article, we use farmers’ actual experiences with changes in rainfall levels and their responses to these changes to assess whether patterns of fertilizer use are responsive to changes in rainfall patterns. READ MORE

6. 4. Towards a Health Economic Simulation Model of Type 2 Diabetes in Sweden

   Author : Aliasghar Ahmad Kiadaliri; Hälsoekonomi; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

   Abstract : The aim of this thesis was to provide part of the data required in updating/developing computer simulation models (CSMs) for type 2 diabetes mellitus (T2DM) using data obtained from routine clinical practice in Sweden. In paper I, evolution of five biomarkers (i.e. READ MORE

7. 5. Cost optimization of maintenance scheduling for wind turbines with aging components

   Author : Quanjiang Yu; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Integer linear optimization; Age-based preventive maintenance scheduling; Renewal-reward theorem; Weibull distribution; Combinatorial optimization; Wind turbine maintenance; Virtual replacement; Condition monitoring data; Cox proportional hazards method; Linear programming;

   Abstract : A major part of the wind turbine operation cost is resulted from the maintenance of its components. This thesis deals with the theory, algorithms, and applications concerning minimization of the maintenance cost of wind power turbines, using mathematical modelling to find the optimal schedules of preventive maintenance activities for multi-component systems. READ MORE