Our results suggest that, on average, sales promotions
have neither a positive nor a negative effect on brand preference
beyond the promotion period. While the overall mean
effect is not statistically significant, this does not suggest
that sales promotions do not affect brand preference. Consistent
with the notion that multiple mechanisms may affect
post-promotion preferences (e.g., purchase reinforcement
can bolster post-promotion brand preference while the promotion
usage effect weakens preference), sales promotions
may either undermine or augment brand preference depending
on the promotion and the characteristics of the product
being promoted. We believe the conditional nature of our
findings provides valuable insights for both brand managers
and scholars