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  fixed effect models
Using OLS fixed-effect models, we find that both entrepreneurship and regional development are higher within different LPS than not within them.
      
The expenditure on ecolabeled paper towels was also analyzed using Tobit and Fixed effect models.
      
Table 3 presents the results for the fixed-effect models using the three variants of Tobin's q as dependent variables.
      
In addition, we use fixed-effect models to account for explanatory factors at the State level.
      
In the absence of adequate instrument and fixed-effect models, estimating reduced-form equations has proved to be a viable solution.
      
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Diailel crossing systems have been used extensively in plant breeding programs in the pcast 30 yeas.Procedures of estimation and testing hypotheses of general and specific ombining abilities from diallel crossing methods were discussed in several papers by Jinks, Griffing and Hayman in 1953—1956. Derivations of the analysis procedures, however, were not given in these papers. We have presented, in this report, all detailed steps of calculating sum of squares and expected mean squares for various diallel mating...

Diailel crossing systems have been used extensively in plant breeding programs in the pcast 30 yeas.Procedures of estimation and testing hypotheses of general and specific ombining abilities from diallel crossing methods were discussed in several papers by Jinks, Griffing and Hayman in 1953—1956. Derivations of the analysis procedures, however, were not given in these papers. We have presented, in this report, all detailed steps of calculating sum of squares and expected mean squares for various diallel mating systems for both random and fixed effects models.We hope breeders will find it a convenient reference and thus enhance then application of diallel crossing techniques whe(?) appropriate.

近三十年来,双列杂交育种法在育种试验中已普遍应用。有关一般配合力与特殊配合力的估算及假设测验方法,在Jinks,Griffing及Hayman的文章中均有述及(1953-1956)。然而,这些分析法的导出却没有阐述过。本文详尽地推导了不同模型下的平方和及期望均方的计算方法,旨在为育种家们提供方便的参考资料,促进双列杂交育种法的更广泛应用。

Meta-analysis is a quantitative method to intergrate the research findings- It has been applicated in every fields of medicine at abroad. Meta-analysis has played an unique role in area such as diagnosis, treatment, risk evaluation, intervention and prevention. This paper has introduced the principle, performance and content of meta-analysis, and two statistical models that is fixed effect model and random effect model. Also some examples have been presented.

Meta-analysis是一种定量综合研究结果的方法,在国外已应用于医学各领域,其在诊断、治疗、危险度评价、干预、预防及决策等方面起着独特的作用.本文阐述了Meta-analysis研究方法的基本原理、研究过程与内容,介绍了二个常用统计方法即固定效应模型和随机效应模型,并有部分实例应用.

In the present paper, case-control studies on the relationship between HBV infection and hepatocellular cancer in China were analyzed and evaluated by means of meta-analysis method. Fixed effect model and Random effect model were applied to process data. The pooled OR (Positive v.s. negative) of HBsAg, HBV overall infection, anti-HBs, anti-HBc were 11.61, 11.19, 0.21, 7.84 respectively and their PAR were 60.15%, 85.99%, 79% (preventive fraction), 70.61% respectively. The possible bias and confounding...

In the present paper, case-control studies on the relationship between HBV infection and hepatocellular cancer in China were analyzed and evaluated by means of meta-analysis method. Fixed effect model and Random effect model were applied to process data. The pooled OR (Positive v.s. negative) of HBsAg, HBV overall infection, anti-HBs, anti-HBc were 11.61, 11.19, 0.21, 7.84 respectively and their PAR were 60.15%, 85.99%, 79% (preventive fraction), 70.61% respectively. The possible bias and confounding were also discussed.

本文应用Meta分析方法对国内多个有关乙型肝炎与肝癌关系的病例对照研究进行了定量综合分析。采用固定效应模型(Fixed effect model)和随机效应模型(Random effect modl)处理数据。HBsAg、HBV总感染、抗—HBs,抗—HBc的综合OR分别为11.61、11.19、0.21、7.84;它们的PAR分别为60.15%、85.99%、79%(预防分值)、70.61%。另对可能的混杂和偏倚进行了分析讨论。

 
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