I am new to this forum and this is my first post here.
Would like to show you this URL:
http://www.forskning.no/artikler/2010/september/259957
It is norwegian language and I have not serarched for english version.
I hope you can understand what is its message by studying the figures.
Is the story very different from yours?
I did not read your book and may do it if you give me a reply here.
--
jo