Gibson, MA; Lawson, DW; (2011) "Modernization" increases parental investment and sibling resource competition: evidence from a rural development initiative in Ethiopia. Evolution and human behavior, 32 (2). pp. 97-105. ISSN 1090-5138 DOI: https://doi.org/10.1016/j.evolhumbehav.2010.10.002 Full text not available from this repository.