提高效率、维护公平:产权四模式对深化我国集体林权改革的启示

回顾我国集体林权改革的主要进展,介绍产权四模式的主要观点,提出深化集体林权改革的思考和建议。研究发现,林权改革没有统一的格式,产权四模式总结了发展中国家林权改革的一些规律,可以为我国集体林改所借鉴;与其他模式相比,财产权模式对我国集体林改影响最大,明晰产权、提高效率一直是集体林改的目标;农业结构模式明确提出的市场机制可能带来产权不安全的问题需要引起重视;制度模式主张政府发挥产权改革的主导作用、制定法律法规巩固产权的主张对深化林权改革有重要借鉴意义;共有产权模式提出的保留共有森林资源为贫困人口提供"一席之地"的主张,为减贫和乡村振兴提供思路。在结束明晰产权主体改革任务之后,应将工作重点转向制定相关法律法规巩固产权改革成果、维护农户林权利益;在推动林地规模化经营中,要谨慎推进森林资源金融化,防止出现"代价高昂的不平等";充分认识集体林权改革的复杂性、艰巨性和长期性,将林改工作从工程式运作逐渐转向常规监管,加强林权管理。     

传统文士人格与“二十四友”的附势心态

传统文士在春秋战国崛起时,对道与势的态度经历了由对道的恪守到对势的依附的转轨过程。汉以后,由于儒术的强化、引导、依附权势成为传统文士人格的普遍特征。“二十四友”的附势心态就是这种特征在西晋政治、文化背景下的自然显现。与文学史上其它文士集团相比,“二十四友”的附势心态表现得最为典型。     

Cohabitation in Great Britain: not for long, but here to stay

This paper uses a new source of data to study the dramatic increase in cohabiting unions in Great Britain. It analyses, in turn, entry into first partnership, the stability of cohabiting unions and repartnering after dissolution of cohabitation. In excess of 70% of first partnerships are now cohabitations, and these last a relatively short time before being either turned into marriage or dissolved. The shift to cohabitation as the dominant mode of first partnership plays an important role in the delay of first marriage and motherhood. The paper also investigates the factors that are associated with the outcome of cohabitations.     

A semi-parametric method for estimating the beta coefficients of the hidden two-sided asset return jumps

ABSTRACT

We introduce a new methodology for estimating the parameters of a two-sided jump model, which aims at decomposing the daily stock return evolution into (unobservable) positive and negative jumps as well as Brownian noise. The parameters of interest are the jump beta coefficients which measure the influence of the market jumps on the stock returns, and are latent components. For this purpose, at first we use the Variance Gamma (VG) distribution which is frequently used in modeling financial time series and leads to the revelation of the hidden market jumps' distributions. Then, our method is based on the central moments of the stock returns for estimating the parameters of the model. It is proved that the proposed method provides always a solution in terms of the jump beta coefficients. We thus achieve a semi-parametric fit to the empirical data. The methodology itself serves as a criterion to test the fit of any sets of parameters to the empirical returns. The analysis is applied to NASDAQ and Google returns during the 2006–2008 period.     

Strengths,weaknesses, opportunities,and threats to housing first in Metro Vancouver

ObjectivesTo understand the experience of Metro Vancouver’s Homelessness Partnering Strategy-funded Housing First program and how it is functioning from the perspective of a representative sample of providers and clients who deliver and receive HF services.MethodsThirty-four clients and providers who currently or formerly delivered HF in Metro Vancouver participated in one-on-one interviews (n = 26) or focus groups (n = 8) between March and April 2017 and data were thematically analyzed.ResultsStrengths of the HF program included: the ability to transition persons from the street into housing with individualized service supports and, in certain cases, with 12-month rent subsidies, household goods, and connection to community resources. Identified program weaknesses were: eligibility criteria, limited rent subsidy funds, limited provider capacity, and workload burden. Suggested opportunities to improve HF were: streamlining federal and provincial reporting and rent subsidy systems and building friendly landlord networks. Potential threats to HF described were: limited affordable housing, stigma and discrimination toward clients, inadequate income assistance, and limited opportunity for cross-sector collaboration.ConclusionsThe delivery of HF in regions that have limited affordable housing presents unique challenges. Recommendations are provided to improve HF practice and policy in these contexts.     

Robust inference for estimating equations with nonignorably missing data based on SIR algorithm

Nonresponse is a very common phenomenon in survey sampling. Nonignorable nonresponse – that is, a response mechanism that depends on the values of the variable having nonresponse – is the most difficult type of nonresponse to handle. This article develops a robust estimation approach to estimating equations (EEs) by incorporating the modelling of nonignorably missing data, the generalized method of moments (GMM) method and the imputation of EEs via the observed data rather than the imputed missing values when some responses are subject to nonignorably missingness. Based on a particular semiparametric logistic model for nonignorable missing response, this paper proposes the modified EEs to calculate the conditional expectation under nonignorably missing data. We can apply the GMM to infer the parameters. The advantage of our method is that it replaces the non-parametric kernel-smoothing with a parametric sampling importance resampling (SIR) procedure to avoid nonparametric kernel-smoothing problems with high dimensional covariates. The proposed method is shown to be more robust than some current approaches by the simulations.     

习近平人民健康观的产生缘由、思想内涵与实践价值

习近平人民健康观是新时代保障和实现人民健康的世界观和方法论,是习近平新时代中国特色社会主义思想的重要组成部分。习近平人民健康观继承和发展了马克思主义关于人民健康重要论述的理论观点,是对新时代全面建设健康中国新征程的实践慎思。习近平人民健康观有着丰富而又深刻的思想内涵:以建设健康中国为战略目标,以把人民健康放在第一位为根本原则,以坚持中国特色卫生与健康发展道路为科学道路,以加强科技创新为关键举措,以防治结合、联防联控、群防群控为科学方法。习近平人民健康观构建起进行伟大斗争的健康基石,赋予了建设伟大工程的健康使命,激活了推进伟大事业的健康基因,夯实了实现伟大梦想的健康基础。贯彻落实习近平人民健康观,对于新时代统揽“四个伟大”具有重要的实践价值。     

乡村振兴背景下民族地区新型城镇化-旅游产业-生态环境协调发展研究——以四川、云南、甘肃、青海四省为研究区域

本文构建四省民族地区新型城镇化-旅游产业-生态环境协调发展评价指标体系,运用耦合协调模型、地理探测器和灰色预测模型展现、分析及预测四省民族地区新型城镇化、旅游产业与生态环境（以下简称“UTE”系统）协调关系及演进过程。研究发现2008-2018年该区域UTE系统协调水平不断优化上升,内部发展不均衡,差距进一步拉大;新型城镇化领先,旅游产业和生态环境滞后是总体特征;经济发展和生态环境改善是制约和影响耦合度的关键因素;未来协调度稳步提升,但演进速度区域差异明显。基于此提出尊重和保护文化环境为四省民族地区的发展基础、加强区域合作、构建区域发展协调保障机制的建议。     

"扬雄三进制"研讨

通过对"扬雄三进制"由来的揭示,继而论证了各数难以确认的原因;然后提出了确认各数的公式以及三进制的拓展,三进制与十进制的换算及优越性;简介了三进制加、减、乘、除的运算法.     

抓住人类生存的节点弹奏现代生命的心音——《墙上的斑点》解读

《墙上的斑点》是世界意识流短篇小说的经典之作,是一篇由一个“重要的瞬间”构筑而成的小说,通篇铺陈的是“我”在斑点的触发下细密的感触和绵延的意识,透射出作者幽雅而深邃的哲思,小说凸显了伍尔夫创作的现代理念,是文学走向人类本体的艺术探索。《墙上的斑点》是意识的流,是生命的真,是人类的心曲。