The paper propose a hypothesis of the expense ratio and the fund size: there is a positive or negative correlation between the fund expense ratio and size which tried to demonstrate the size effect.

对基金费用与基金规模提出假设，即基金费用率与其规模正或负相关，验证基金管理的规模效应。

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Mental belief or national and social belief had positive correlation and material belief or religious belief had negative correlation with social stability consciousness.

精神信仰和国家社会信仰与社会安定意识呈正相关，物质信仰和宗教信仰与社会安定意识呈负相关。

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The genetic correlation between the birth weight, weaning weight and the other propagation traits mostly were weak positive correlation or negative correlation.

初生重、断奶重分别与其他各繁殖性状间的遗传相关和表型相关大多为弱的正相关或负相关。

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First, we know that to reduce risk you need to combine assets that have a low positive correlation or, ideally, a negative correlation with other assets.

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