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This study presents insights into the determinants of tourists' intention to pay a premium for accommodation in a hotel with renewable energy sources. The empirical analysis is based on the estimation of binary logistic regression models. Four subsets of independent variables were used in this empirical analysis, namely: (i) demographic factors, (ii) economic variables, (iii) past experience with regard to renewable energy sources and (iv) variables regarding environmental awareness and information dissemination. Empirical results suggest that middle-aged people are probably more willing to pay for their stay in a hotel using renewable energy. In general, men are more likely than women to pay extra money for accommodation in a "green" hotel. However, the results suggest that marital status and educational level are not statistically significant factors in the willingness to pay more. Rather, environmentally-conscious and adequately informed tourists are more willing to pay for renewable energy than others. Our analysis is focused on intention because we expect that those people willing to pay for staying in a green hotel are a potentially relevant market segment for developing sustainable tourism in Greece.

The objective of this paper is to examine the Wagner's law validity, and whether it can explain the U.K. public spending expansion for the period 1850-2010. According to Wagner's Law, economic development is the key determinant to public sector growth. Accordingly, the public sector grows overproportionally compared to national income when economies develop. We test this hypothesis for the UK. The data covers a period in which the U.K. economy experienced increased economic growth, government spending and met most of the assumption of Wagner's Law (industrialisation, urbanisation, increased population). Furthermore, the long data set ensures the reliability of our results in terms of statistical and economic conclusions. We apply unit root tests, unit root tests with structural breaks, cointegration techniques and the Granger causality test. Our results indicate a presence of a long run relationship between national income and government spending, while the causality is bi-directional, thus we find support for Wagner's and Keynesian hypotheses.

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