A horizontal shift seems more realistic. You just compress one part of the curve or skip ahead along it. Then a small shift early on leads to an equally small shift later.
Of course, there are other considerations like overhang and community effects that complicate the picture, but this seems like a better place to start.
A horizontal shift seems more realistic. You just compress one part of the curve or skip ahead along it. Then a small shift early on leads to an equally small shift later.
Of course, there are other considerations like overhang and community effects that complicate the picture, but this seems like a better place to start.