股票市场短期时间序列投机对经理投资行为的影响

公司投资行为受股票市场投机影响,投机性时间序列的实质是影响信息收集行为,股市短期时间序列投机者选择接收关于外生震荡不确定性的私人信息,博弈经理投资决策并对经理投资行为产生影响。本文基于信息结构研究股票市场短期时间序列投机对经理投资行为的影响,分析股票市场博弈均衡和经理有效均衡行为,阐明经理低效率投资决策行为的实质。     

基于模糊逻辑的偏柔性工作车间调度模型

文章首先介绍了局部柔性工作车间调度以及模糊环境下的调度目标函数等相关概念,然后从预处理、个体编码、算子设计等方面分阶段详细描述了基于模糊逻辑的局部柔性工作车间调度模型,最后通过实例验证了模型的可行性和有效性。     

Isotonic Window Estimators of the Baseline Hazard Function in Cox's Regression Model Under Order Restriction

The regression model suggested by Cox (1972) has been widely used in survival analysis with censored observations. We propose isotonic window estimators for a monotone baseline hazard function in the Cox regression model. We prove that these estimators are asymptotically normal. The simulati on results presented in the article suggest that the proposed estimator performs better than several existing estimators in the literature     

First Partial Differentiation by Computer with an Application to Categorical Data Analysis

A strategy is presented for producing code to evaluate first partial derivatives of a function f by computer. Advantage is taken of the capabilities that a compiler must have simply to bring about the evaluation of f. A bound kt on the time it should take to evaluate the partials of f is developed, where f takes time t to evaluate and k is independent of f. The benefits of the differentiation strategy for weighted least squares analysis of categorical data are discussed.     

群体资格:社会认同事件的新路径

面对多元社会力量的雕刻，个体作为能动行动者被赋予或力图获得多元的群体成员资格，并建构或解构／重构多元的社会认同，以缔造动态而同一的完整生命。这种社会认同事件的兴起，有其确定的思想史条件和历史脉络，并迫切地嵌入在中国社会转型过程中。以认同语义变迁为切入点，论文概要评论当代社会认同研究的困境。基于群体资格构念，论文把个体生命历程中所遭遇的多元社会力量的雕刻过程归类为不同共同体的教化过程，尝试为超越现有的认同研究提供新方案。论文最后展现了群体资格路径可能具有的方法论意涵。     

混杂试验方法Ⅱ

本文通过混杂原理 ,应用多因素高水平试验处理组合的一部分进行试验 ,即保证试验研究的核心主效和一级互作得到正确估计 ,又能大量减少试验处理数 ,简化试验实施操作 ,提高试验研究效率     

高能量下的硬球散射截面

本文采用分波法 ,讨论了在极高能量下 ,半径为 R的硬球的散射问题 ,其结果是散射截面趋于 2πR2 。     

A Generalized View on Continuum Regression

ABSTRACT. We generalize the relationship between continuum regression (Stone & Brooks, 1990) and ridge regression, by showing that any optimization principle will yield a regressor proportional to a ridge regressor, provided only that the principle implies maximizing a function of the regressor's sample correlation coefficient and its sample variance. This relationship shows that continuum regression as defined via ridge regression ("least squares ridge regression") is a more generally valid methodology than previously realized, and also opens up for alternative choices of its second and subsequent factors.     

有限时域内部分缺货的变质品生产-定价策略研究

研究有限时域内对变质产品同时安排生产计划和制定定价策略的问题。有限时域被划分成同等长度的多个周期,产品以固定的生产率间歇生产,并以固定的速率发生变质。需求同时依赖于时间和产品价格,在每个周期内都允许缺货且短缺量部分延迟订购。目的是要寻求一个使有限时域内系统的平均利润最大化的生产计划和定价策略。在算例中,分别讨论了需求随时间增大和减小两种不同的需求模式,采用Box复合算法,通过数值计算求得相应的最优生产计划和定价策略。分析表明：对于成长期或销售季初的产品,系统应采用“小批量多批次”的生产方式;而对于衰退期或销售季末的产品,应采用“大批量小批次”的生产方式。此外,不同类型的产品在不同需求模式下的定价策略有所不同：对于有限时域较短或变质率较高的产品,处于衰退期或销售季末的定价要低于成长期或销售季初的定价;相反,对于有限时域相对较长或变质率较低的产品,在衰退期或销售季末的最优定价要高于在成长期或销售季初的定价。     

The heterogeneous impact of insurance on health care demand among young adults: a panel data analysis*

Success of the recently implemented Affordable Care Act hinges on previously uninsured young adults enrolling in coverage. How will increased coverage, in turn, affect health care utilization? This paper applies variable coefficient panel models to estimate the impact of insurance on health care utilization among young adults. The econometric setup, which accommodates nonlinear usage measures, attempts to address the potential endogeneity of insurance status. The main finding is that, for approximately one-fifth of young adults, insurance does not substantially alter health care consumption. On the other hand, another one-fifth of young adults have large moral hazard effects. Among that group, insurance increases the probability of having a routine checkup by 71–120%, relative to mean probabilities, and insurance increases the number of curative-based doctor office visits by 67–181%, relative to the mean number of visits.