@article{Clemens2008,
author = {Clemens, Michael A. and Pritchett, Lant},
title= {Income per Natural: Measuring Development for People Rather Than Places},
year = {2008},
doi = {10.1111/j.1728-4457.2008.00230.x},
journal = {Population and Development Review},
volume = {34},
number = {3},
pages = {395--434},
}