The disambiguation notice area is used to provide information that helps distinguish one author from another. Do not use the canonical name field for this purpose.
RAL, author of Child Care and Culture.. is Robert Alan LeVine, b. 1932, a sociologist and psychologist.
RAL, author of Adjusting to Global Economic Change ..., is Robert Arthur Levine (note spelling), a retired economist and policy analyst (died 6 Dec 2010).
Both these authors have works listed on the 'Robert Levine' author page. Note that there are at least two medical authors who publish as Dr Robert A Levine.