Preprint:<p><a href="https:&#x2F;&#x2F;www.brown.edu&#x2F;research&#x2F;projects&#x2F;oster&#x2F;sites&#x2F;brown.edu.research.projects.oster&#x2F;files&#x2F;uploads&#x2F;Why_is_Infant_Mortality_Higher_In_US.pdf" rel="nofollow">https:&#x2F;&#x2F;www.brown.edu&#x2F;research&#x2F;projects&#x2F;oster&#x2F;sites&#x2F;brown.ed...</a>