“…Of the 19 study observations analysed, 13 indicated substitution (Brown & Rork, 2005;Farrell & Forrest, 2008;Fink & Rork, 2003;Forrest, Gulley, & Simmons, 2004;Garrett & Marsh, 2002;Grote & Matheson, 2006;Mikesell & Zorn, 1987;Roger & Chabi, 2009;Stover, 1990;Tosun & Skidmore, 2004;Walker & Jackson, 2008), two found a complementary relationship (Forrest & McHale, 2007;Purfield & Waldron, 1999), and four found no impact (Farrell & Forrest, 2008;Forrest et al, 2004;Gulley & Scott, 1993;Lin & Lai, 2006). This result indicates that intra-product cannibalization (Srinivasan et al, 2005) is common in the lottery markets.…”