I'm familiar with basic statistical techniques like anova, regression and trend forecasting. However, I want to use SAS to identify possible causal relations when there are numerous different types of rare categorical events occurring over time. In other words, event Y may have occurred 5 times in the last 3 years, and every time it was just preceded by event X. There may be hundreds of these different events occurring though, most of them just noise and unrelated. I'm guessing that this is a common statistical problem and SAS has procedures to investigate data like this?
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