Talk about big city distortion.
I can't help thinking this trend is at its zenith. Where economic growth is faltering, we're seeing de-urbanization, and I would be long the yellow areas and short the red, because if there is any upset to the JIT way our cities operate (London for example is said to have a mere 4 days worth food in stock), for reasons of climate change or political upheaval or some other reason (no more opportunity in overcrowded cities?), the rural areas on which we still enormously depend for food and water may suddenly revalue upwards.