Search for dissertations about: "hazard regression"

Showing result 1 - 5 of 149 swedish dissertations containing the words hazard regression.

2. 1. Estimation of hazard ratios from observational data with applications related to stroke

   Author : Guilherme Barros; Jenny Häggström; Marie Eriksson; Daniel Nevo; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; survival analysis; causal inference; hazard ratios; marginal hazard ratio; stroke; balancing; Statistics; statistik;

   Abstract : The objective of this thesis is to examine some challenges that may emerge when conducting time-to-event studies based on observational data. Time-to-event (also called survival) is a setting that involves analyzing how different factors may influence the length of time until an individual experiences the event of interest. 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. Child Mortality during the Demographic Transition. A Longitudinal Analysis of a Rural Population in Southern Sweden, 1766-1894

   Author : Kent Johansson; Ekonomisk-historiska institutionen; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; nutrition; frailty; the demographic transition; Sweden; hazard regression; family effects; Scania; Barker hypothesis; Child mortality; early life conditions; enclosure; Social and economic history; Ekonomisk och social historia;

   Abstract : The great decline in mortality has had a vital impact on our societies. Life expectancy has more than doubled in the past 200 years, but no acceptable explanation has yet been given for the earlier part of the decline in mortality, even though it has attracted a very broad interdisciplinary interest. READ MORE

6. 4. 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

7. 5. Essays on Climate Change and Forest Management

   Author : Jiegen Wei; Göteborgs universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Dynamic games; Stock externalities; Carbon tax; Social Norms; Moral Hazard; Environmental Regulation; Energy pricing; Chinese forests; Economic growth; Manager turnover; Ownership; Selection of managers; Firm productivity;

   Abstract : Paper I analyses the exhaustion of oil resources, and the transition to a backstop technology as a strategic game between two blocks: the consumers and producers of oil which we simply refer to as “OPEC” and “OECD”. The OECD has two instruments: it can tax fuel consumption and decide when to switch to the carbon neutral backstop technology. READ MORE