We focus on three environmental impacts particularly influenced by population agestructure-carbon emissions from transport and residential energy and electricity consumption-as well as aggregate carbon emissions for a panel of developed countries, and take as our starting point the STIRPAT framework. Among our contributions is to further disaggregate population into three particularly key age groups: 20-34, 35-49, and 50-64, and by doing so demonstrate that population's environmental impact differs considerably across age-groups, with the older age-groups (ones typically associated with larger households) actually exerting a negative influence. Furthermore, those age-specific population influences are different (in absolute and relative terms) for the different environmental impacts we analyze. Also, we find that urbanization, in developed countries, best measures access to a country's power grid, and thus, is positively associated with energy consumption in the residential sector. Lastly, we suggest some modelling and methodological improvements to the STIRPAT framework.

Might electricity consumption cause urbanization instead? Evidence from heterogeneous panel long-run causality tests. ABSTRACTThe share of a population living in urban areas, or urbanization, is both an important demographic, socio-economic phenomenon and a popular explanatory variable in macro-level models of energy and electricity consumption and their resulting carbon emissions. Indeed, there is a substantial, growing subset of the global modeling literature that seeks to link urbanization with energy and electricity consumption, as well as with carbon emissions. This paper aims to inform both modelers and model consumers about the appropriateness of establishing such a link by examining the nature of long-run causality between electricity consumption and urbanization using heterogeneous panel methods and data from 105 countries spanning 1971-2009. In addition, the analysis of the time series properties of urbanization has implications both for modelers and for understanding the urbanization phenomenon. We consider total, industrial, and residential aggregations of electricity consumption per capita, three income-based panels, and three geography-based panels for non-OECD countries. The panel unit root, cointegration, and causality tests used account for cross-sectional dependence, nonstationarity, and heterogeneityall of which are present in the data set. We cannot reject pervasively Granger causality in the urbanization to electricity consumption direction. However, the causality finding that is both the strongest and most similar across the various panels is that of long-run Granger causality from electricity consumption to urbanization. In other words, the employment and quality of life opportunities that access to electricity afford likely encourage migration to cities, and thus, cause urbanization. Also, nearly all countries' urbanization series contained structural breaks, and the most recent post-break annual change rates suggested that nearly all countries' rates of urbanization change were slowing. Lastly, future modeling work on energy consumption or carbon emissions should consider subnational scales of analysis, and focus on measures of urban density or urban form rather than national urbanization levels.

This paper examines the contribution of tourism industry to the GDP of three selected destinations in the Middle East region: Bahrain, Jordan and Saudi Arabia. We introduce a quadratic functional form and apply the advanced panel cointegration dynamic model with robust estimation to test our hypothesis. Our analysis is based on a comprehensive set of panel data of tourism receipts, education investment, foreign direct investment and fixed capital formation over the period of 1981–2008. The results show a long‐run relationship between tourism growth and GDP. We also show that tourism has a stronger impact on the economy than other related sectors. Copyright © 2013 John Wiley & Sons, Ltd.

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