Alcohol consumption and risky sexual behavior among young adults: evidence from minimum legal drinking age laws

This paper exploits the discrete jump in alcohol consumption at the minimum legal drinking age (MLDA) in the USA and uses a regression discontinuity design to investigate the relationship between drinking and risky sexual behaviors among young adults. Using confidential data from the National Longitudinal Survey of Youth (1997 Cohort), we document that young adults tend to drink up to 2.1 days more once they are granted legal access to alcohol at age 21. Although the discrete jump in alcohol consumption at the MLDA is associated with an increase in the probability of having sex by up to 7.8 percentage points, it does not have a significant impact on the probability of engaging in risky sexual behaviors among young adults. We also document that the effect of the MLDA on the probability of using several different birth control methods is not significant for those who had sex in the past 4 weeks. These results are robust under alternative specifications and imply that although the MLDA law is quite effective in reducing alcohol consumption among young adults, spillover effects of this law on risky sexual behaviors are relatively limited.     

基于社会交换理论的药品流通秩序规范研究

文章基于社会交换理论对药品流通过程中存在的问题及原因进行了扼要分析,并就如何规范药品流通秩序提出了相关建议。核心思想是通过重构药品流通市场利益格局,实现主体间的权力制约和资源互补合作,从根本上改变药品流通秩序混乱的局面。     

指导思想一元化与意识形态一元化之辨——兼论“坚持马克思主义在意识形态领域的指导地位”

学习探讨六个“为什么”理论问题,理清指导思想在意识形态领域的内涵、作用和地位,有利于辩明指导思想一元化与意识形态一元化的关系,消除人们思想上的混沌。坚持马克思主义在意识形态领域的指导地位,坚持“多样并存,一元指导”原则。在学习教育过程中,做到合理性和必要性的统一、坚持一元和包容多样的统一及思想和政策的统一。     

集群式供应链的链间动态博弈合作决策分析

不同传统单链式供应链,本文针对集群式供应链中,分析了两供应链间在同一地域的动态竞合关系,建立了信息不对称下的Stackeberg Nash博弈模型,并在此基础上将资金时间价值和决策者对预期置信约束加以考虑,来分析集群式供应链中两供应链中的各自核心企业作出供应链战略的决策偏向.     

Nicht alles ist „systemisch“

This article is a reply to an essay titled “Systemic—what else!”, recently published by Claus Nowak. Despite of great sympathy with Nowak’s passionate plea for an appreciative use of classical approaches to counseling and consulting—especially approaches of the humanistic psychological tradition—our analysis shows that the terms “systemic” and “systems theory” open up our understanding for new phenomena. Therefore, an adequate usage of the term “systemic” and a proper utilization of “systems theory” and its principles are not superfluous.     

Selection of sparse vine copulas in high dimensions with the Lasso

Statistics and Computing - We propose a novel structure selection method for high-dimensional ( $$d > 100$$ ) sparse vine copulas. Current sequential greedy approaches for structure...     

Nonparametric Bayesian inference in applications

Nonparametric Bayesian (BNP) inference is concerned with inference for infinite dimensional parameters, including unknown distributions, families of distributions, random mean functions and more. Better computational resources and increased use of massive automated or semi-automated data collection makes BNP models more and more common. We briefly review some of the main classes of models, with an emphasis on how they arise from applied research questions, and focus in more depth only on BNP models for spatial inference as a good example of a class of inference problems where BNP models can successfully address limitations of parametric inference.     

Was Achtsamkeitstrainings bewirken und wie sie in Organisationen wirksamer werden

In this article in the journal Gruppe. Interaktion. Organisation (GIO) we discuss the impact of individual mindfulness trainings on organizations. Therefore, we combine research on high reliability organizations with aspects of the newer sociologist system theory. First we seek to define the construct of mindfulness and we distinguish between individual and collective mindfulness as two different qualities of mindfulness. Using an example from the banking sector we discuss the challenges developing mindfulness in organizations and what intervention strategies could work. We distinguish between the three system levels psyche, interaction and organization. Doing this it becomes clear that interventions have to consider the coupling of the three different levels: How interventions have to be designed to effect all three levels?     

Tree-based modeling of time-varying coefficients in discrete time-to-event models

Lifetime Data Analysis - Hazard models are popular tools for the modeling of discrete time-to-event data. In particular two approaches for modeling time dependent effects are in common use. The...