115 research outputs found
The Effect of Education on Smoking Behavior: New Evidence from Smoking Durations of a Sample of Twins
This paper analyses the effect of education on starting and quitting smoking, using longitudinal data of Australian twins. The endogeneity of education, censoring of smoking durations and the timing of starting smoking versus that of completion of education are taken into account by the flexible Mixed Proportional Hazard specification. Unobserved effects are assumed to be twin specific and possibly correlated with completed education years. We find that one additional year of education reduces the duration of smoking with 9 months but has no effect on the decision to start smoking.education, duration models, smoking
Shape: A 3D Modeling Tool for Astrophysics
We present a flexible interactive 3D morpho-kinematical modeling application
for astrophysics. Compared to other systems, our application reduces the
restrictions on the physical assumptions, data type and amount that is required
for a reconstruction of an object's morphology. It is one of the first publicly
available tools to apply interactive graphics to astrophysical modeling. The
tool allows astrophysicists to provide a-priori knowledge about the object by
interactively defining 3D structural elements. By direct comparison of model
prediction with observational data, model parameters can then be automatically
optimized to fit the observation. The tool has already been successfully used
in a number of astrophysical research projects.Comment: 13 pages, 11 figures, accepted for publication in the "IEEE
Transactions on Visualization and Computer Graphics
The Effect of Childhood Conduct Disorder on Human Capital
This paper estimates the longer-term effects of childhood conduct disorder on human capital accumulation and violent and criminal behaviour later in life using data of Australian twins. We measure conduct disorder with a rich set of indicators based on diagnostic criteria from psychiatry. Using ordinary least squares (OLS) and twin fixed effects (FE) estimation approaches, we find that early (pre-18) conduct disorder problems significantly affect both human capital accumulation and violent and criminal behaviour over the life course. In addition, we find that conduct disorder is more deleterious if these behaviours occur earlier in life.conduct disorder, human capital, twins
Organisational ethnography and religious organisations: The case of Quaker decision-making
How should we study the management practices of religious organizations to do justice to their distinctive religious motivations and traditions? In this paper, we articulate how a specific research approach ā organizational ethnography ā may enable a deeper understanding of religious and/or spiritual organizational practice. We approach our methodological research questions by engaging with the literature on the distinctive decisionmaking practices of the Religious Society of Friends (Quakers), commonly known as the Quaker business method. Having shown that the Quaker business method destabilizes a simple binary between āinsiderā and āoutsiderā and between believers and non-believers, we bring the theory and practice of organizational ethnography into conversation with Quaker accounts of decision-making. We conclude with pathways for future research in the space this destabilization creates
The effect of education on smoking behavior: new evidence from smoking durations of a sample of twins
This paper analyses the effect of education on starting and quitting smoking, using longitudinal data of Australian twins. The endogeneity of education, censoring of smoking durations and the timing of starting smoking versus that of completion of education are taken into account by the flexible Mixed Proportional Hazard specification. Unobserved effects are assumed to be twin specific and possibly correlated with completed education years. We find that one additional year of education reduces the duration of smoking with 9 months but has no effect on the decision to start smoking
The effect of childhood conduct disorder on human capital
This paper estimates the longer-term effects of childhood conduct disorder on human capital accumulation and violent and criminal behaviour later in life using data of Australian twins. We measure conduct disorder with a rich set of indicators based on diagnostic criteria from psychiatry. Using ordinary least squares (OLS) and twin fixed effects (FE) estimation approaches, we find that early (pre-18) conduct disorder problems significantly affect both human capital accumulation and violent and criminal behaviour over the life course. In addition, we find that conduct disorder is more deleterious if these behaviours occur earlier in life
Why are criminals less educated than non-criminals? Evidence from a cohort of young Australian twins
Why are criminals less educated than non-criminals? Evidence from a cohort of young Australian twins
The effect of childhood conduct disorder on human capital
This paper estimates the longer-term effects of childhood conduct disorder on human capital accumulation and violent and criminal behaviour later in life using data of Australian twins. We measure conduct disorder with a rich set of indicators based on diagnostic criteria from psychiatry (e.g., aggression to people and animals, destruction of property, deceitfulness or theft, and/or serious violations of rules). Using ordinary least squares (OLS) and twin fixed effects (FE) estimation approaches, we find that early (pre-18) conduct disorder problems significantly affect both human capital accumulation and violent and criminal behaviour over the life course. For instance, within pairs of identical twins we find that conduct disorder reduces the probability of high school graduation with 4 to 13 percent points and increases the probability of being arrested with 7 to 16 percent points. Robustness checks suggest that these estimates may be lower bounds of the true effects of conduct disorder. In addition, we find that conduct disorder is more deleterious if these behaviours occur earlier in life. We conclude that childhood mental health problems have high human and financial costs for families and society at large. Effective treatments early in life might yield high returns
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