> "I can almost always get a seat on a train that used to be packed" > "the fare went from $3.10 to $5.50 each way" I suspect there is a cause & effect relati

> "I can almost always get a seat on a train that used to be packed" > "the fare went from $3.10 to $5.50 each way" I suspect there is a cause & effect relationship between these two observations. But which is which?