Missing Data and Edge Issues * *There is a large literature dealing with the issues discussed in this chapter; see, e.g., Afifi and Elashoff (1966, 1967), Kelejian (1969), Griffith and Amrhein (1983), Griffith (1983, 1985), Anselin (1988, 2002), Besag et al. (1991), Little (1992), Borcard and Legendre (2002), LeSage and Pace (2004), Kelejian and Prucha (2010b), Kelejian et al. (2013), Wang and Lee (2013), and the references cited therein.