I am now completing research supported by NSF and NEH that is mapping changes in the English language through all of North America, for both mainstream and minority communities.
William LabovHowever, research in the years that followed found that in many of its important features, African American Vernacular English was becoming not less, but more different from other dialects.
William LabovBut unlike European countries, America has never finished a map of the United States, only the eastern United States is covered and a few spots here and there.
William Labov