ThisĀ information was put together by Patrick Gaule, senior lecturer in economics at the University of Bath and research fellow at the Institute for Quantitative Social Science at Harvard University. The underlying data was collected as part of a series of academic research projects studying scientific collaborations or international labor mobility. You can find details about this work here. Please read the methodology page for details on how placements were constructed. While a lot of effort has been put into ensuring the reliability of the data, mistakes are possible. Comments are welcome here.