since 2002 Guest researcher (post-retirement) at the Max Planck Institute for Human Development (Berlin) and continued research on social inequality and its impact on children's development
2002年至今 马克思·普朗克人类发展研究所(柏林)客座研究员(退休后)，并继续研究社会不平等问题及其对儿童成长的影响