For some reason, I was thinking about this the other day. But I have another reason, at least for the U.S. The east side is most likely to be older because pe

For some reason, I was thinking about this the other day. But I have another reason, at least for the U.S. The east side is most likely to be older because people migrated from east to west. The wealthier people would move to the west as the east side of town got more crowded and older.