Garrow, Alan J.P. "Chapter Sixteen: Conclusion." The Gospel of Matthew's Dependence on the Didache. New York: T&T Clark International, 2004,244-252.
Garrow concludes that while the Didache is a composite composition, with substantial elements drawn into the record, Matthew is a unified composition. The points of similarity suggest to Garrow that Matthew drew from the Didache rather than the Didache drawing from Matthew or both from some other source (Garrow 2004, 245). For the influence to be upon the Didache, it would have to compel several redactors to choose material which was used by Matthew and nobody else, and to gather the materials into tight clusters while Matthew spread them out. This stikes Garrow as unlikely (Garrow 2004, 246).