Proportionality Assumption in Latent Basis Curve Models: A Cautionary Note     

Wei Wu  Kyle M. Lang 《Structural equation modeling》2016,23(1):140-154

Latent basis curve models (LBCMs) have been popular in modeling change when the change trajectories are unknown or nonlinear. The estimated change trajectories from LBCMs are often viewed as optimal and used as reference points against which other change trajectories are tested. However, there is a proportionality assumption underlying LBCMs that has received little attention from researchers. This study uses a Monte Carlo simulation to show that violation of this assumption can potentially result in substantially biased estimates of the means and variances of changes and covariate effects on these changes, leading to incorrect statistical inference. The implications of the simulation study are discussed and alternatives to LBCMs are suggested for use when the proportionality assumption is likely to be violated.  相似文献   

论生命视角下的教师教育   总被引：3，自引：0，他引：3  

李国庆  官瑞娜 《扬州大学学报(高教研究版)》2006,10(4):65-67

教育的起点是“人”的教育,教师的责任是教人做人。教育不仅要关注学生的生命成长,也需要关注教师的生命成长。在以往的教师教育中,我们过分注重教师的技能化培训,而忽视了教师生命的完善与发展。因此,要实现人的完整性,使之走向完美境界,就必须完善教师的生命价值,使其在帮助学生完整实现自己的同时也创造着属于教师自己的生命意义与自身价值。  相似文献   

FDI对中国区域经济增长的影响及差异分析   总被引：2，自引：0，他引：2  

卫春江  樊新生 《信阳师范学院学报(哲学社会科学版)》2004,24(2):55-56

目前外商直接投资(FDI)虽有向中西部推进的趋势,但仍集中于东部沿海地区。各地区投资效率的差异是外商直接投资的重要因素。我国中西部地区应从改善投资软环境入手,强化其促进经济增长的传导机制,努力消除与东部地区在投资效率上的差距,实现区域经济协调发展。  相似文献   

教育叙事与教师成长   总被引：7，自引：0，他引：7  

刘铁芳 《河北师范大学学报(教育科学版)》2005,7(6):22-26

教师成长乃是教师在立足于个人教育生活合理性的基础上，对个人教育生活的不断发现和个体教育意识的全面觉知。教育叙事正是通过对教师个体成长过程之中的各种偶然性事件的发现，而提升教师对自我教育生活观照的能力，全面提升自我教育意识，在不断提高教育专业水平的同时，提高教师教育生涯的生命质量，促进教师的成长。  相似文献   

增长曲线模型中回归系数的线性估计的可容许性     

尹长明  王炜炘  王成名 《柳州职业技术学院学报》2005,5(3):99-102

对增长曲线模型,当协差阵是降秩的,在矩阵损失函数下,本文分别给出了回归系数的线性估计在非齐次线性估计类和全体估计类中是可容许估计的条件.  相似文献   

Boundary control of a linear distributed parameter bioprocess     

Hideki Sano 《Journal of The Franklin Institute》2003,340(5):293-306

This paper is concerned with boundary control of a linear distributed parameter bioprocess. Huang's result (Ann. Differential Equations 1(1) (1985) 43) on the spectrum determined growth assumption is applied to prove that the closed-loop system becomes exponentially stable under a certain condition with respect to the feedback gain. Moreover, it is shown that the decay rate of the open-loop system is given by letting the feedback gain tend to zero.  相似文献   

Undesirable economic growth via agents’ self-protection against environmental degradation     

Angelo Antoci  Paolo Russu 《Journal of The Franklin Institute》2007,344(5):377-390

Our model analyzes the effects of the interplay between environmental degradation and consumption choices on economic growth dynamics and on economic agents’ welfare. We show that if private goods can be consumed as substitutes for environmental goods, then economic growth may be fueled by environmental deterioration. In this context, undesirable economic growth may occur, characterized by an inverse correlation between aggregate capital accumulation and economic agents’ welfare.  相似文献   

唐山城乡居民消费对经济增长影响差异化的实证分析     

冬佳  刘岭 《科学与管理》2016,(6):64-68

作为多年来经济总量位居河北省第一位的唐山市,这几年国民经济得到了飞速发展,消费需求总量的逐步扩大在一定程度上对经济增长的拉动起到了举足轻重的作用。本文建立了城乡居民消费水平与唐山经济增长关系的误差修正模型,研究表明唐山城乡居民消费对其经济增长有正向拉动作用,城镇居民消费的拉动作用比农村居民的要大。因而,采取措施缩小城乡居民消费的差距,统筹二者的发展,是唐山完成两个"率先"的目标、建成全面小康社会不得不面对的问题。  相似文献   

WTO与农民收入增长研究   总被引：3，自引：0，他引：3  

杨俊龙 《预测》2002,21(5):78-80

本文通过定性分析和定量计算，找到影响农民收入增长的最重要因素；结合WTO《农业协议》及我国农业资源变化趋势和中国人口实际，提出逐步加大财政支农力度及区别对待；加强农业和农村经济发展的宏观调控，结合各地实际，分类指导；采取灵活的土地承包政策，实现土地规模经营，提高土地的产出率等一系列增加农民收入措施。  相似文献   

Externalities, technological complementarities and sustained economic growth     

Kenneth I. Carlaw  Richard G. Lipsey   《Research Policy》2002,31(8-9)

Externalities as conventionally defined miss many of the spillovers that are both causes and consequences of the technological changes that underlie economic growth. We introduce a much wider concept called technological complementarities. New general purpose technologies (GPTs) rejuvenate the growth process by creating technological complementarities, which are adequately measured neither by total factor productivity (TFP) nor by externalities. There would be major gains from technological change even if the returns on capital invested in innovation never exceeded the returns on investing in existing technologies so that there were neither externalities nor positive changes in TFP.  相似文献