African American Children's Adjustment: The Roles of Maternal and Teacher Depressive Symptoms

This study examined the unique and interactive roles of mother and teacher depressive symptoms in child adjustment in 277 African American single mother‐headed families, as well as whether the associations differed depending on the age and gender of the child. Findings revealed a significant association between maternal depressive symptoms and child depressive symptoms in girls, but not boys. Moreover, the combination of higher levels of both mother and teacher depressive symptoms was associated with the highest level of child depressive symptoms and, for younger children, externalizing symptoms. The importance of considering the multiple social contexts in which children interact is discussed.     

论养老保险基金参与公司治理

通过对国有企业改制中公司治理方面出现的问题的分析 ,从养老保险基金参与对公司治理方面进行探讨 ,提出改进上市公司治理机制的现实政策选择 ,这有利于我国证券市场的发展和完善 ,有利于我国国有企业的改革     

牛心朴子草抗植物病毒组分的生物活性研究

牛心朴子草地上部分醇浸粗提物（H）对烟草花叶病毒（TMV）有高抑制活性。该草抗植物病毒有效组分是菲并吲哚是西定生物总碱（G），半中枯斑法测定（G）制剂对TMV，马铃薯Y病毒（PVY），和芜菁花叶病毒（TUMV）呈现高活性；用酶联免疫法（Elisa)测定(G）制剂对TUMV的最佳浓度防效，与枯斑法测定结果基本要符。（G）中含量最丰的（1）7－脱甲氧基娃儿藤碱（antofine)是该草活性最高的主组分，它在10^-6g/ml浓度的TMV抑制率达60％。     

Review Essay: What Is Left of the Left?

Sociological Forum -     

发展农业适度规模经营的思考与对策

在分析农业适度规模发展现状及制约因素基础上 ,研究并提出应用市场机制、调整产业结构、优化农村生产要素 ,发展农业适度规模经营的思路、途径和对策     

A Comparison of Partially Adaptive and Reweighted Least Squares Estimation

The small sample performance of least median of squares, reweighted least squares, least squares, least absolute deviations, and three partially adaptive estimators are compared using Monte Carlo simulations. Two data problems are addressed in the paper: (1) data generated from non-normal error distributions and (2) contaminated data. Breakdown plots are used to investigate the sensitivity of partially adaptive estimators to data contamination relative to RLS. One partially adaptive estimator performs especially well when the errors are skewed, while another partially adaptive estimator and RLS perform particularly well when the errors are extremely leptokur-totic. In comparison with RLS, partially adaptive estimators are only moderately effective in resisting data contamination; however, they outperform least squares and least absolute deviation estimators.