Jonathan Miller is on a roll. Yesterday he posted a list of reasons why the Case Shiller Index isn't as helpful for the Washington area as some people think. Today he digs a little deeper and looks at the math from three different points of view: timing, seasons and price lags. While yesterday's post was about the geographical focus being too broad, today's three posts drill down even more into the nuances that go into these reports. Anyone who has a graph phobia should be very, very afraid.