 Baker acted as a part-time professor at Clark University from 1923 to 1927, and later gave several series of lectures at other universities.With the appearance of the journal "Economic Geography", Baker became associate editor, and later a contributor of a notable series of articles on regional agricultural geography of North America.His interest in farm populations started around 1920, however it was during the 1930s that this field became a major focus of the USDA.