“…The test rejects the price homogeneity hypothesis and price symmetry hypothesis, but fails to reject the promotion homogeneity hypothesis. The rejection of the theoretical restrictions in empirical demand studies may be due to errors in functional forms, data aggregation, or dynamic nature of consumer behavior that a static AIDS model does not capture (Anderson & Blundell, 1983), and are common, rather than the exception as found in previous seafood demand studies (Barten and Bettendorf, 1989;Eales et al, 1997;Park et al, 2004;Xie et al, 2008Xie et al, , 2009Xie & Myrland, 2011;Thong, 2012). This study follows common practices of previous studies by imposing theoretical restrictions on the empirical estimation of the demand system, and compares the effects of restrictions on the estimates between the restricted and unrestricted models.…”