兰溪童公山村轿夫对其主顾依附关系特点考

通过就兰溪童公山村轿夫对其主顾依附关系的实证分析 ,不仅证明兰溪历史上曾有过被称为“轿夫”的堕民 ,也给历史留下一个贱民对其主顾是如何依附的实证 ,还对贱民存在的根本原因作了初步探讨。笔者认为至少该地贱民的存在是社会原因造成的 ,学者认同的“政治民族压迫说”是不适用的     

Reliability analysis of systems with components having two dependent subcomponents

In this article, a system that consists of n independent components each having two dependent subcomponents (A_i, B_i), i = 1, …, n is considered. The system is assumed to compose of components that have two correlated subcomponents (A_i, B_i), and functions iff both systems of subcomponents A₁, A₂, …, A_n and B₁, B₂, …, B_n work under certain structural rules. The expressions for reliability and mean time to failure of such systems are obtained. A sufficient condition to compare two systems of bivariate components in terms of stochastic ordering is also presented.     

Stochastic properties of the mixed accelerated hazard models

The accelerated hazard model in survival analysis assumes that the covariate effect acts the time scale of the baseline hazard rate. In this paper, we study the stochastic properties of the mixed accelerated hazard model since the covariate is considered basically unobservable. We build dependence structure between the population variable and the covariate, and also present some preservation properties. Using some well-known stochastic orders, we compare two mixed accelerated hazards models arising out of different choices of distributions for unobservable covariates or different baseline hazard rate functions.     

Risk aggregation with dependence and overdispersion based on the compound Poisson INAR(1) process

Abstract

This paper considers an extension of the classical discrete time risk model for which the claim numbers are assumed to be temporal dependence and overdispersion. The risk model proposed is based on the first-order integer-valued autoregressive (INAR(1)) process with discrete compound Poisson distributed innovations. The explicit expression for the moment generating function of the discounted aggregate claim amount is derived. Some numerical examples are provided to illustrate the impacts of dependence and overdispersion on related quantities such as the stop-loss premium, the value at risk and the tail value at risk.     

直播电商用户使用影响因素研究

作为数字经济的新兴业态,直播电商已成为助力经济社会发展的新动能。如何更好地捕捉公众需求、认知用户行为、提升发展质量、推动行业升级成为直播电商领域的重点研究内容。本文以技术接受与使用整合理论为基础框架,结合感知风险与路径依赖理论,建立直播电商用户使用影响因素模型,研究绩效期望、努力期望、社会影响、便利条件对用户行为意愿和使用行为的影响作用,以及感知风险、路径依赖与上述因素之间的相关关系,并对加快推进直播电商发展提出对策建议。     

Bivariate Birnbaum-Saunders accelerated lifetime model: estimation and diagnostic analysis

In this paper, we discuss the bivariate Birnbaum-Saunders accelerated lifetime model, in which we have modeled the dependence structure of bivariate survival data through the use of frailty models. Specifically, we propose the bivariate model Birnbaum-Saunders with the following frailty distributions: gamma, positive stable and logarithmic series. We present a study of inference and diagnostic analysis for the proposed model, more concisely, are proposed a diagnostic analysis based in local influence and residual analysis to assess the fit model, as well as, to detect influential observations. In this regard, we derived the normal curvatures of local influence under different perturbation schemes and we performed some simulation studies for assessing the potential of residuals to detect misspecification in the systematic component, the presence in the stochastic component of the model and to detect outliers. Finally, we apply the methodology studied to real data set from recurrence in times of infections of 38 kidney patients using a portable dialysis machine, we analyzed these data considering independence within the pairs and using the bivariate Birnbaum-Saunders accelerated lifetime model, so that we could make a comparison and verify the importance of modeling dependence within the times of infection associated with the same patient.     

Uniform asymptotics for ruin probability of a two-dimensional dependent renewal risk model

ABSTRACT

In this paper we consider the tail behavior of a two-dimensional dependent renewal risk model with two dependent classes of insurance business, in which the claim sizes are governed by a common renewal counting process, and their inter-arrival times are dependent, identically distributed. For the case that the claim size distribution belongs to the intersection of long-tailed distribution class and dominant variation class, we obtain an asymptotic formula, which holds uniformly for all time in an infinite interval. Moreover, we point out that the formula still holds uniformly for all time in an infinite interval for widely dependent random variables (r.v.s) under some conditions.     

依赖与脆弱性：农民养老问题的一个实证分析——基于全国十个省份1000余位农民的调查数据

文章基于2009年全国十个省份30个行政村1000余位农民的调查数据，从“依赖性一脆弱性一养老困境”的逻辑关系出发．以农民养老的经济依赖途径为切入点。利用Multinomial Logistic回归模型，实证分析了农民养老的脆弱性及其影响因素。结果显示，那些同时具备女性、年龄较大、养儿防老观念比较强、家庭收入比较低、没有儿子、家庭整劳力比较少、纯农户和所在村经济情况比较差特征的农民，是依赖性最强的农民，他们面临的养老脆弱性程度也最高。由于现实生活中。全部具备上述所有条件的农民毕竟是少数。但农村社会政策刺定部门可以根据农民满足上述条件的多寡．来判断其养老脆弱性程度的高低。并以此为依据选择农村社会政策的重点关注对象。     

巴勒斯坦经济发展中的以色列因素分析

第三次中东战争后，以色列对约旦河西岸和加沙地带的占领为巴勒斯坦农业和工业带来了诸多负面影响，并使巴勒斯坦经济具有较强的依附性，突出表现为劳务输出和进出口贸易对以色列的依赖。以色列的占领严重地影响了巴经济的发展，并造成了巴勒斯坦在巴以和谈中的劣势。     

对"出口导向"和"进口替代"两种外贸发展战略的再认识

本文对进口替代和出口导向两种外贸战略进行了分析,认为我国应该充分利用大国的优势,立足于国内需求,降低对外依存度,同时应根据经济全球化的内在要求积极与世界经济接轨,实施进口替代与出口导向相结合的外贸战略,以成功应对经济全球化的挑战。