中学生心理素质概念和成分的研究

运用问卷调查和因素分析等量性研究方法,结合技术性文献分析、开放性译码、主轴译码等质性理论研究方法,对中学生心理素质概念和成分进行了探讨;获得了中学生心理素质是以生理条件为基础的,将外在获得的东西内化成稳定的、基本的、衍生的,并与人的社会适应行为和创造行为密切联系的心理品质,包含认知因素、个性因素和适应性因素三个维度,具体化为２２个因素成分。     

婚生子女制度探析

本文参酌国外婚生子女法律制度,结合我国国情,提出了建立我国婚生子女制度的立法构想,并就确立婚生子女的法律内涵,婚生子女的推定及否认制度等作了探讨。     

论清末女学

中国正规的女校出现于清朝末年。它的出现提高了中国女性的文化素质 ,为女性参与社会创造了条件。但由于受传统和时代的限制 ,清末女学的产生并不能使广大中国女性走向独立解放的道路     

钱穆与新考据派关系略论——以钱穆与傅斯年的交往为考察中心

新考据派主要是指以傅斯年为领袖、以史语所为中心、以整理和考订史料真伪为职志、以"为学问而学问"的治学态度相标榜的史料学派。该派内以乾嘉史学为依托,外以西方近代实证史学为应援,曾雄霸民国史坛达20多年,是当时声势最盛的史学主流派。钱穆与史料学派的领袖傅斯年的交往、二人治史异同反映了20世纪中国史学曲折而又多途并进的发展历程。     

谈教师劳动与教育效率问题

重视教师劳动 ,提高教育效率是教育事业发展的需要 ,为此 ,一要合理确定教师的工作定额 ;二要扩大办学规模 ,发挥教师潜能 ;三要深化学校人事制度改革 ,合理教师劳动负担     

Optimal Inattention to the Stock Market With Information Costs and Transactions Costs

Information costs, which comprise costs of gathering and processing information about stock values and costs of deciding how to respond to this information, induce a consumer to remain inattentive to the stock market for finite intervals of time. Whether, and how much, a consumer transfers assets between accounts depends on the costs of undertaking such transactions. In general, optimal behavior by a consumer facing both information costs and transactions costs is state‐dependent, with the timing of observations and the timing and size of transactions depending on the state. Surprisingly, if the fixed component of the transactions cost is sufficiently small, then eventually, with probability 1, a time‐dependent rule emerges: the interval between observations is constant and on each observation date, the consumer converts enough assets to liquid assets to finance consumption until the next observation. If the fixed component of transactions costs is large, the optimal rule remains state‐dependent indefinitely.     

品牌和单品忠诚对在线消费者选择行为的影响研究

不同消费者对于不同品牌特性有不同的偏好和忠诚度,如果不考虑不同类型的偏好,不在消费者品牌选择模型中引入消费者的品牌忠诚或单品忠诚行为,将不能很好地刻画消费者购买行为的异质性和动态性,难以提高模型的解释力度。文章通过构建动态多项Logit离散选择模型,研究和鉴别在线渠道每一个消费者品牌忠诚因子和单品忠诚因子。研究发现,在线环境下消费者在可乐产品的选择上,不同的忠诚特性对在线消费者品牌选择的影响强度是不同的,其中单品忠诚对在线消费者品牌选择的影响最为显著,这不仅刻画了消费者购买概率的异质性,而且提高了模型的解释力度;不同的属性虽然会对在线消费者的品牌选择行为产生影响,但这种影响并不是孤立存在的,而是会受到其他属性或忠诚变量的影响而产生相应变化。     

Inference in Dynamic Discrete Choice Models With Serially orrelated Unobserved State Variables

This paper develops a method for inference in dynamic discrete choice models with serially correlated unobserved state variables. Estimation of these models involves computing high‐dimensional integrals that are present in the solution to the dynamic program and in the likelihood function. First, the paper proposes a Bayesian Markov chain Monte Carlo estimation procedure that can handle the problem of multidimensional integration in the likelihood function. Second, the paper presents an efficient algorithm for solving the dynamic program suitable for use in conjunction with the proposed estimation procedure.     

Bounding Optimal Expected Revenues for Assortment Optimization under Mixtures of Multinomial Logits

We consider assortment problems under a mixture of multinomial logit models. There is a fixed revenue associated with each product. There are multiple customer types. Customers of different types choose according to different multinomial logit models whose parameters depend on the type of the customer. The goal is to find a set of products to offer so as to maximize the expected revenue obtained over all customer types. This assortment problem under the multinomial logit model with multiple customer types is NP‐complete. Although there are heuristics to find good assortments, it is difficult to verify the optimality gap of the heuristics. In this study, motivated by the difficulty of finding optimal solutions and verifying the optimality gap of heuristics, we develop an approach to construct an upper bound on the optimal expected revenue. Our approach can quickly provide upper bounds and these upper bounds can be quite tight. In our computational experiments, over a large set of randomly generated problem instances, the upper bounds provided by our approach deviate from the optimal expected revenues by 0.15% on average and by less than one percent in the worst case. By using our upper bounds, we are able to verify the optimality gaps of a greedy heuristic accurately, even when optimal solutions are not available.     

专利技术授权、产品分销与分销渠道选择研究

从专利技术转化为现实生产力的视角,为研究技术供应商、制造商以及零售商之间的专利技术授权与分销渠道选择问题,构建不同渠道结构下的经济模型。通过模型求解,得到最优专利技术授权与产品定价决策以及分销渠道策略。研究发现：1)在专利技术授权阶段,技术供应商会策略性地选择仅包含固定授权费或者“版税提成+固定授权费”形式的授权合同;2)在产品分销阶段,制造商根据渠道成本、消费者渠道偏好、市场规模等因素来选择不同渠道结构,包括单渠道分销策略和双渠道分销策略;3)不同分销渠道选择不会影响授权合同形式,但会促使技术供应商和制造商调整各自的最优决策。最后,对原始模型进行不同维度的扩展,探究第三方电商平台模式、零售商渠道入侵模式等情形下的专利技术授权问题。