“…In particular, consumers tend to over-report desirable behaviours and under-report undesirable behaviours (Bagozzi, 1994;Bagozzi, Yi, & Nassen, 1999), they often overestimate their demand (Klein et al 1997), or might be conditioned by the answer order. Second, even when reports are not biased, variables affecting the intentions to purchase might change over time, thus creating changes in the actual purchases (Infosino, 1986;Morwitz et al, 2007;Sun and Morwitz, 2010). Furthermore, the relationship between intention to purchase and subsequent behaviour may differ across different groups of people (Morwitz and Schmittlein, 1992).…”