Optimal financing and dividend policy with Markovian switching regimes

This work investigates an optimal financing and dividend problem for an insurer whose surplus process is modulated by an observable continuous-time and finite-state Markov chain. We assume that the insurer should never go bankrupt by issuing new equity. The goal of the insurer is to maximize the expected present value of the dividends payout minus the discounted cost of equity issuance. We obtain the optimal policies and explicit expressions for the value functions when the risk reserve process is modeled by both upward jump model and its diffusion approximation. Numerical illustrations of the sensitivities of the model parameters are provided.     

Generalized information matrix tests for copulas

We propose a family of goodness-of-fit tests for copulas. The tests use generalizations of the information matrix (IM) equality of White and so relate to the copula test proposed by Huang and Prokhorov. The idea is that eigenspectrum-based statements of the IM equality reduce the degrees of freedom of the test’s asymptotic distribution and lead to better size-power properties, even in high dimensions. The gains are especially pronounced for vine copulas, where additional benefits come from simplifications of score functions and the Hessian. We derive the asymptotic distribution of the generalized tests, accounting for the nonparametric estimation of the marginals and apply a parametric bootstrap procedure, valid when asymptotic critical values are inaccurate. In Monte Carlo simulations, we study the behavior of the new tests, compare them with several Cramer–von Mises type tests and confirm the desired properties of the new tests in high dimensions.     

感性消费时代的广告受众心理分析

通过对广告受众心理进行分析,总结出新形势下广告受众心理的主要特点。具体受众心理分析是：一、感性心理：情趣情调;自我比拟;理想向往;流行时尚;交流互动;品牌偏好。二、理性——感性心理：实用价值观念变异;自我价值中的理性与感性;体现个性。     

粤港澳大湾区西部核心产业创新空间提升规划思考 ——以顺德为例

在粤港澳大湾区一体化发展背景下,顺德以土地换产值的传统增长模式难以为继,制造业面临巨大的下行压力,根本原因是城市创新空间系统性、产学研协同创新转化、优质服务的创新空间不能匹配顺德日益增长的发展需求.本文结合产业创新空间相关基础研究,从内外部创新空间格局视角,重点梳理顺德产业创新空间方面的规划探索.从区域创新合作、多元创新协同、提升空间供给等方面总结既有经验并提出新的思考.     

A new algorithm to estimate monotone nonparametric link functions and a comparison with parametric approach

The generalized linear model (GLM) is a class of regression models where the means of the response variables and the linear predictors are joined through a link function. Standard GLM assumes the link function is fixed, and one can form more flexible GLM by either estimating the flexible link function from a parametric family of link functions or estimating it nonparametically. In this paper, we propose a new algorithm that uses P-spline for nonparametrically estimating the link function which is guaranteed to be monotone. It is equivalent to fit the generalized single index model with monotonicity constraint. We also conduct extensive simulation studies to compare our nonparametric approach for estimating link function with various parametric approaches, including traditional logit, probit and robit link functions, and two recently developed link functions, the generalized extreme value link and the symmetric power logit link. The simulation study shows that the link function estimated nonparametrically by our proposed algorithm performs well under a wide range of different true link functions and outperforms parametric approaches when they are misspecified. A real data example is used to illustrate the results.     

网络文学版权保护探析

侵犯网络文学著作权尤其是信息网络传播权的现象在当下十分严重。侵权的模式包括"云霄阁模式"和"百度模式"。它的背后既体现了社会公众、网络服务提供者和版权人之间的利益平衡,也是互联网精神、权利意识和商业模式三者博弈的结果。解决侵犯网络文学版权的问题需要注重培育公众正确的互联网意识、完善法律制度建设、创新文学网站的盈利模式及大力发挥社会组织的作用。保护网络文学著作权对创新虚拟社会管理有重要意义。     

模仿狂潮如此被掀起——《江南style》在青少年中走红的心理学解读

韩国音乐人朴载相的音乐作品《江南style》自网络发行后,以类似"病毒式"传播速度迅速走红,特别是受到年轻人的普遍追捧和青睐,由此掀起了一股模仿狂潮,具体有两种不同性质的表现:一是对作品本身真正的模仿,二是对作品模仿群体的从众跟风。除音乐作品自身因素外,《江南style》的走红与青少年群体的心理特点密不可分。     

21世纪大学生心理压力探析

本文认为 ,当今大学生的心理压力主要有 3种 :大学生活的压力、个人成长的压力和社会大环境的压力。大学生活的压力包括适应的压力、学业的压力和集体生活的压力 ;个人成长的压力包括人际成长的压力、自我完善的压力、与性和爱情有关的成长压力 ;社会大环境的压力包括就业的压力、社会对人才的高要求压力和经济压力。指出进行压力处理的心理健康教育十分重要。     

跨文化意识的培养：问题与对策

在外语教学活动中，有效地培养学生的跨文化意识，增强学生的跨文化交际能力，既是教育工作者的历史使命，也是外语教学改革的一项重大课题。探索在外语教学中培养学生跨文化意识的主要途径，很有现实意义。     

魏晋南北朝史发展要义二题

魏晋南北朝约400年,为分裂割据时期,战乱促使人们思维活跃,无论政治、军事、经济、文化皆出现了承上启下的新内涵。而其要义则为政治上的儒法结合和三省六部制,军事上的府兵制,经济上的均田制,文化上的永明新体诗和骈文的出现,所有这些对后世历史发展具有深远影响。