Although those factors in themselves are not accounted for, the cultural differences in cross-country effects are extensively documented. The supplement materia

Although those factors in themselves are not accounted for, the cultural differences in cross-country effects are extensively documented. The supplement material is available for free at http://science.sciencemag.org/content/suppl/2018/10/17/362.6412.eaas9899.DC1 http://science.sciencemag.org/content/suppl/2018/10/17/362.6...