In the paper, some remarks are made on several primary testing methods of causality, and the existent problems in these testing methods analyzed thoroughly.
文章对几种主要的因果关系检验方法进行了评析，并针对这些检验方法存在的问题作了深入分析。
Methods of documentation and causality were used.
研究方法：文献资料法和因果分析法。
It is pointed out that there are some restrict principles and concrete application methods in using presumption principle of causality.
同时认为适用因果关系推定原则应有原则、条件等限制，并配以具体的方法。
The study also USES cointegration test, Granger causality test as measurement methods. It tries to study new perspective on clear ideas and use scientific research methods.
研究还采用了协整检验和格兰杰因果关系检验等计量方法，力求做到研究视角新颖、研究思路清晰、研究方法科学。
Causality Analysis is often used to qualitatively analyze engineering quality and product quality but the influence degree of each factor cold not 'be estimated with the methods.
因果分析法常用于对工程质量和产品质量问题的定性分析，但是无法判断各因素的影响度。
Causality Analysis is often used to qualitatively analyze engineering quality and product quality but the influence degree of each factor cold not 'be estimated with the methods.
因果分析法常用于对工程质量和产品质量问题的定性分析，但是无法判断各因素的影响度。
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