Gabriel: I don't think you can reject the growth-child survival link in Kenya based on the observation that child under-nutrition rates did not decline during the period of rapid economic growth. Under-nutrition rates often don't respond to economic growth. There are several reasons, but one is that, as their income grows, poor people often buy better-tasting food, which is not necessarily more nutritous. It doesn't follow, though, that they don't take better care of their kids in other ways, including safer water and sanitation practices, and treatment for acute illness. So it could be that the explanation for Kenya's rapid child mortality decline is still its rapid economic growth.