6. Discussion and conclusions
We have analyzed the effects of hotel chain characteristics on the decision to be part of a quality certification system, as well as on the change in the proportion of certified hotels of the chain. The use of two dependent variables, associated but different, is interesting as the first of these is primarily linked to the strategic perspective of chain managers and their initial (ex ante) interest in adopting certification as a support for their own brand. In contrast, the second variable is related to the results of certification and increasing or decreasing interest on the part of managers after observing the effects of quality certification in those properties that have been certified. In sum, the last variable is related to the ex post effectiveness of the Q brand, whereas the first can be affected more directly by managers’ prior beliefs about this certification.
We consider our result for the antecedent variable “geographical concentration” very intriguing as in the Heckman first stage (with the dependent variable Q-period), the resulting coefficient is not significant (p = 0.15), whereas in the Heckman second stage (with the dependent variable Trend), this coefficient is clearly significant (p = 0.01). Thus, it seems that the degree of geographical concentration has no influence on the decision to be part of the quality certification system. However, among certified chains, it affects their increasing or decreasing tendency to use the certification. So, this factor might play a relevant role in certification results, meaning that those chains that are concentrated in a location and that have some certified establishments (that is, those that have been able to observe certification results) tend to increase their level of certification use. Results suggest that the effect of the geographical concentration of the chain on the effectiveness of the certification is underrated by managers in their initial certification adoption decisions. Although it is not frequently taken into account by managers in their ex ante decisions, certification is especially interesting for those hotel chains characterized by their geographical concentration.