that i regret most are the laws of a gifted faculty member, and when olivier went back to mit, that wonkette to the top of the list and it's remained there. for the rest of my life. i'd -- i'm not going to try to do everything in the book. what i would like to do is take a little bit about what's in it and why i wrote it. you know, i had the privilege of working in china with olivier and a number of others. i had a huge privilege of sharing the growth commission with a distinguished group of political policy leaders and as i said in a preference to book i i learned an enormous amount from our mood and our colleagues. and came to have a better understanding, at least than i did of us are dynamics of high speed growth in the catch-up mode in the emerging economy, the developing world. and i wanted to share some of that because i found in talking to investors, and others, you know, this growth that is relatively remote from their lives is somewhat puzzling, so they say, questions like is a sustainable? and i said you have to look at the dynamics that we know seem to work and see if you can find