But here 's the trick : the relationship isn 't causal , just correlated .

不过这里面的问题是：这并不是因果关系，只是相关关系。

These collective movements turn uncorrelated risks into highly correlated ones .

这些集体行为将无关的风险转变成高度相关的风险。

These results correlated strongly with infection rates and patient outcomes .

这些调查结果与感染率及患者的治疗效果有很强的关联性。

Returns became increasingly correlated with other investments .

回报与其它投资的相关性越来越强了。

Falling gdp tends to be correlated with people going bankrupt or being fired .

而gdp不断下滑则往往与破产或失业联系在一起。