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Qualitative Sociology -     

Living Arrangements, Employment Status, and the Economic Well-Being of Mothers: Evidence from Brazil, Chile, and the U.S

Using data from Brazil, Chile, and the U.S., we estimate country specific models of household income that characterize mothers according to their marital status, living arrangement, and employment status. We assess the predicted economic well-being of each type of mother relative to a benchmark of married mothers in the same country, and at various points in the income distribution. We find dramatic cross-country differences in the distribution of mothers across categories, but few differences in each type's relative economic status. In all three countries and at all points in the income distribution, mothers who are the only adults in their households have the lowest levels of predicted income, while married mothers—followed closely by cohabitors—have the highest levels.     

Identifying race and ethnicity in the 1979 National Longitudinal Survey of Youth

The 1979 National Longitudinal Survey of Youth is among the few surveys to provide multiple reports on respondents’ race and ethnicity. Respondents were initially classified as Hispanic, black, or “other” on the basis of data collected during 1978 screener interviews. Respondents subsequently self-reported their “origin or descent” in 1979, and their race and Hispanic origin in 2002; the latter questions conform to the federal standards adopted in 1997 and used in the 2000 census. We use these data to (a) assess the size and nature of the multiracial population, (b) measure the degree of consistency among these alternative race-related variables, and (c) devise a number of alternative race/ethnicity taxonomies and determine which does the best job of explaining variation in log-wages. A key finding is that the explanatory power of race and ethnicity variables improves considerably when we cross-classify respondents by race and Hispanic origin. Little information is lost when multiracial respondents are assigned to one of their reported race categories because they make up only 1.3% of the sample.

Long memory stochastic volatility : A bayesian approach

We propose a simulation-based Bayesian approach to the analysis of long memory stochastic volatility models, stationary and nonstationary. The main tool used to reduce the likelihood function to a tractable form is an approximate state-space representation of the model, A data set of stock market returns is analyzed with the proposed method. The approach taken here allows a quantitative assessment of the empirical evidence in favor of the stationarity, or nonstationarity, of the instantaneous volatility of the data.     

Complete convergence of the non-identically distributed pairwise NQD random sequences

ABSTRACT

In this article, we study complete convergence of the nonidentically distributed pairwise negatively quadrant dependent (NQD) random sequences by the moment inequality and terminating random variables,which extend and improve the previous relevant results.     

基于主体功能区规划的区域土地利用情景分析框架——以贵州省毕节市为例

构建一个基于主体功能区规划的区域土地利用情景分析框架,为市、县统筹国家需求与地区实际合理制定土地利用目标与策略提供方法支撑。以欠发达地区贵州省毕节市为例,对该分析框架进行了应用。结果显示:在"优先满足生态安全和经济发展基本需求,协同平衡满足粮食安全需求"土地利用策略下,毕节市未来的土地利用方案应以生态优先为原则,并强调发展模式的转变,从而协同满足经济发展、粮食安全、生态安全的用地需求。与毕节市相似的欠发达地区需要改变因后备资源优势而采取"大投入换快增长"的土地利用观念,防止走"先破坏后治理"的发展老路,应采取基于综合战略目标的生态优先倒逼机制,引导地区发展方式转变,从而保证地区的可持续发展。分析结果验证了土地利用情景分析框架的适用性,可以尝试将其应用于市、县层面土地调控与规划管理实践。     

浅谈干部人事档案管理

分析了目前人事档案管理的现状,认为存在人事档案管理工作不规范、交接程序不完善、管理手段落后、硬件设施有限、信息化程度不高等问题.提出了通过提高管理人员素质、提高管理水平、将档案集中管理、加强基础建设、注重现代化建设等提升人事档案管理工作的对策措施.