The deployment of a safe and effective vaccine for Covid-19 will be central to lifting containment measures. In a bid to speed up vaccine deployment, governments are entering into ‘Advance Purchase Agreements’ (APAs) with vaccine companies to secure access to vaccine doses. We document and...

Surface soil contamination has been long recognized as an important pathway of human lead exposure, and is now a worldwide health concern. This study estimates the causal effects of exposure to lead in topsoil on cognitive ability among 5-year-old children. We draw on individual level data from...

Conservation programs are a significant part of farm legislation. The recent farm bill increases funding of conservation programs. One result will likely be the increased adoption of basic environmentally benign farming practices, such as conservation tillage. This would lead to improvements in...

In what are now the warm deserts of the American Southwest, direct effects of changing climate on plant distributions are typically viewed as the principal driver of vegetation changes that followed the late Pleistocene-Holocene transition (LPH). However, at a semi-arid site in the eastern...