医疗需求与中国医疗费用增长——基于城乡老年医疗支出差异的视角

在人口老龄化和老年医疗支出城乡差异凸显的背景下,中国医疗费用增长部分源于合理的健康需求。利用中国营养与健康调查1991—2011年的八轮数据,构造出生组跟踪样本,分别考察城乡居民医疗支出的年龄效应,估算城乡老年医疗需求导致的费用上涨,可以发现:城市居民的人均医疗支出随年龄显著增加,但农村居民的人均医疗支出随年龄增长的趋势并不明显。而忽略出生组效应,会低估城乡老年医疗支出的差距。城乡老年医疗支出差距缩小,将导致医疗费用在2010—2030年年均实际增长约5.2%。在控制医疗总费用上涨的同时,医疗保险制度需根据老年医疗需求,调整医疗资源配置结构。     

Environmental Justice in the Context of Scientifi Uncertainty: On the Safety of Genetically Modifi Organisms

应对风险特别是科学不确定性所导致的风险，实现和维护环境正义是当今时代的 一个前沿核心议题。转基因生物安全为代表的科学不确定性背景下的环境正义，需要 建立在相应的科学研究基础之上，但在本质上乃是一种社会构建。对转基因生物技术 及其产品等现代科技的研发、应用和推广等活动，应当维护其市场自由，与此同时， 为了公共安全以及社会弱势群体的最大利益，还应当对相关科技活动进行必要的政府 干预和法律规制。     

Towards Uniformly Efficient Trend Estimation Under Weak/Strong Correlation and Non‐stationary Volatility

In this paper, we consider the deterministic trend model where the error process is allowed to be weakly or strongly correlated and subject to non‐stationary volatility. Extant estimators of the trend coefficient are analysed. We find that under heteroskedasticity, the Cochrane–Orcutt‐type estimator (with some initial condition) could be less efficient than Ordinary Least Squares (OLS) when the process is highly persistent, whereas it is asymptotically equivalent to OLS when the process is less persistent. An efficient non‐parametrically weighted Cochrane–Orcutt‐type estimator is then proposed. The efficiency is uniform over weak or strong serial correlation and non‐stationary volatility of unknown form. The feasible estimator relies on non‐parametric estimation of the volatility function, and the asymptotic theory is provided. We use the data‐dependent smoothing bandwidth that can automatically adjust for the strength of non‐stationarity in volatilities. The implementation does not require pretesting persistence of the process or specification of non‐stationary volatility. Finite‐sample evaluation via simulations and an empirical application demonstrates the good performance of proposed estimators.     

Random effects regression mixtures for analyzing infant habituation

Random effects regression mixture models are a way to classify longitudinal data (or trajectories) having possibly varying lengths. The mixture structure of the traditional random effects regression mixture model arises through the distribution of the random regression coefficients, which is assumed to be a mixture of multivariate normals. An extension of this standard model is presented that accounts for various levels of heterogeneity among the trajectories, depending on their assumed error structure. A standard likelihood ratio test is presented for testing this error structure assumption. Full details of an expectation-conditional maximization algorithm for maximum likelihood estimation are also presented. This model is used to analyze data from an infant habituation experiment, where it is desirable to assess whether infants comprise different populations in terms of their habituation time.     

Constrained vs unconstrained labor supply: the economics of dual job holding

This paper develops a unified model of dual and unitary job holding based on a Stone-Geary utility function. The model incorporates both constrained and unconstrained labor supply. Panel data methods are adapted to accommodate unobserved heterogeneity and multinomial selection into six mutually exclusive labor supply regimes. We estimate the wage and income elasticities arising from selection and unobserved heterogeneity as well as from the Stone-Geary Slutsky equations. The labor supply model is estimated with data from the British Household Panel Survey 1991–2008. Among dual job holders, our study finds that the Stone-Geary income and wage elasticities are much larger for labor supply to the second job compared with the main job. When the effects of selection and unobserved heterogeneity are taken account of, the magnitudes of these elasticities on the second job tend to be significantly reduced.     

"人因"--现代灾害的主要致灾源

1999年自然灾害频发,如台湾、土耳其、希腊的大地震,苏丹、柬埔寨等地的洪水,肆虐美国的飓风……据联合国再保险公司的穆尼黑·雷先生统计,20世纪90年代全球自然灾害数量是60年代的3倍.地处伦敦的格赖恩灾害研究中心的科学家们分析,20世纪60年代和70年代,是全球地震相对沉寂的时期,人们对地震逐渐放松了警惕,很多富人在地震活跃带大兴土木,人口逐渐密集.因而土耳其等地的地震使那么多人伤亡,亦不足为奇.     

德国行政赔偿制度的特色与成因

德国行政赔偿制度有着不同于大陆法系国家和普通法系国家行政赔偿制度的特色,这种特色突出体现在行政赔偿基础的赔偿请求权和对行政赔偿案件进行救济的赔偿审理制度两个方面。德国行政赔偿制度的特色是由在漫长的历史过程中所形成的思想因素、制度因素和文化因素造就而成。     

国有经济是我国对国民经济实行宏观调控的基本手段

发展市场经济需要国家宏观调控已成为世界各国的共识。把国有经济作为实行宏观调控的基本手段可以说是我国作为发展市场经济时间不长的社会主义国家区别于西方资本主义国家的一个重要特征。通过国有经济进行宏观调控 ,既可以充分发挥国有经济的根本制度优势 ,实现国有经济在社会主义市场经济条件下的主导作用 ,又可以满足我国在目前经济发展阶段的特定宏观调控需要。因此 ,把国有经济作为调控手段 ,通过国有经济的主导作用来实现国家宏观经济目标 ,是符合我国国情的现实选择。     

中国律师业迎接国际化竞争的对策构想

我国律师业的对外交流和逐步融入国际律师业已成为历史的趋势 ,这给中国律师业带来了良好的发展机遇 ,但中国律师制度同国际竞争的规则不相适应的诸多问题在很大程度上制约了律师作用的发挥。中国律师必须着眼国际竞争 ,选择优势龙头 ,实行联合重组 ;通过严格的自我教育和自我约束 ,从总体上提升自己的品位和素质     

论预防职务犯罪的道德体系建设

预防职务犯罪是 2 0世纪 80年代以来各国政府普遍采用的一种制度设计 ,其中道德预防是至关重要的环节。道德预防之所以在理论上和实践上可行 ,其依据主要是来源于道德本身的社会功能和法律的不完善性 ,以及职务犯罪主体和行为的特殊性。在我国 ,开展职务犯罪道德预防工作具有一定的优势 ,因此 ,我们必须高度重视这一工作 ,切实加强预防职务犯罪道德预防的道德体系建设