Affiliations: Institute for Applied Research in Youth Development, Tufts University, MA, USA
Address for correspondence: Richard M. Lerner, Institute for Applied Research in Youth Development, 305 Lincoln Filene Building, Tufts University, Medford, MA 02155, USA. Tel.: +1 617 627 5558; Fax: +1 617 627 5596; [email protected].
Note:  The preparation of this article was supported in part by grants from the John Templeton Foundation.