A researcher is studying the causal relationship between drug use and crime. However, she is unable to determine which variable predates the other. This is an issue of ______.

Question

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Time order is crucial in establishing causal relationships, as it is necessary to determine which variable (cause) precedes the other (effect) in time. The researcher's inability to establish which variable comes first indicates an issue with time order.

A Researcher Is Studying the Causal Relationship Between Drug Use