No abstract

The remarkable and multilateral developmental impact and perspective of H.E.Is is widely known. Moreover, the spread of competence and technological innovation should not be a privilege for a few people who have the possibility of acquiring knowledge and skills from the International Academic Institutions. Unfortunately, raw reality remains the same and in order to be reduced, the "conventional" Academic Institutions ought to evolve constantly and develop more remarkable international collaborations in order to be able to exist, operate and contribute to the strongly competitive environment.

This article empirically examines the utility of the gravity modeling in regard to its explanatory resolution, to its power against linearity, and to its geographical scale (intercity vs. interregional). For this purpose, the analysis is performed towards three directions; the first regards the model structure and examines how the number of explanatory variables (drafted from a pool of available predictors) affects the model determination, the second examines the model type, comparing the same predictor configurations entered to gravity multivariate linear regression models, and the third examines the changes induced corresponding interregional and intercity gravity models due to the effect of geographical scale. The analysis shows that the gravity modeling is generally effective in the study of systems of spatio-economic interaction, where the use of its standard expression appears a safe and simple choice. However, this model may also attain many effective extended expressions, and thus, it can be functional in higher complexity demand. Overall, this paper sheds some light to the interregional commuting for the case of Greece and highlights the utility of gravity model in the fields of Econophysics and of economic modeling.

The topic of climate protection is steadily gaining importance in public discussion. This paper shows that CO2 emissions are also gaining significant influence on booking behaviour in tourism. At the same time, it can be demonstrated in the context of a large-scale survey that with a growing desire for CO2 neutrality, higher accommodation rates are also accepted. Large hotel chains already regularly have integrated sustainable thinking into their daily routine. SMEs currently have some catching up to do. While hotel groups are accused of greenwashing, SMEs can generate a competitive advantage through individual, traceable measures.

The Greek Higher Educational Institutes (HEIs) constitute great bureaucratic organizations that display a series of peculiar functional and production features, as for example close dependence upon the given at times governmental power, geographically scattered branches, fragmentation of similar departments, absence and incoherence of the cognitive fields of several departments with the real needs and the available comparative advantages of the geographical areas in which they operate, established and completely oldfashioned production and transmission of knowledge and skills which bear only a very small relation to the contemporary entrepreneurship, innovation, and the job market in general.Thus, lately, under the burden of the country's tragic economic situation and the demands on the part of the Troika for the reduction of the cost of education, as well as of the newly-shaped international educational conditions, there has been attempted a systematic restructuring of the Greek HEIs, on the basis of the application of a specific governmental plan, known under the name of "Athena Plan". Unfortunately however,