Congestion pricing, infrastructure investment and redistribution

We study congestion pricing by a government that has redistributive concerns, in the presence of optimal income taxation. Individuals differ in (unobservable) earning ability and consumption technology for commodities using a congestible network (e.g. roads, Internet). We find, assuming separable preferences, that when efficiency of consumption technology is either invariant or postively correlated with earning ability, low ability individuals should face higher marginal congestion charges than high ability ones. Moreover, reducing congestion (by raising charges or expanding network capacity) enables government to increase redistribution. We also find that means tested congestion pricing may be necessary to implement the second-best allocation.congestion pricing; income taxation; redistribution; infrastructure investment

Cultural gateways - building partnerships for sustainable development in destination regions

This paper introduces the main findings of the CULTURAL GATEWAYS project caried out during 2004-2005 by the author wiht a eserach fellowship at Universitat Autonoma, Barcelona. The aim of the project is the development of a sustainable urban-rural relationship in the organisation of tourist regions around main urban destination. The projects analyses existing visitation models and cognitive processes of visitors in main destinations, as well as existing organisations that produce culture in peripheral areas, elaborating strategies to promote and diffuse these less-known assets. A key motive is to build on the existing tourist potential, developing “gateways” (both physical and virtual) that reconnect the cultural heritage of peripheral communities to existing value chains. The departure point is that the preservation of cultural heritage through responsible tourism is the key to generating both wealth and well being in host communities. Experience demonstrates that host communities are better able to cope with existing problems and new challenges, when all concerned parties jointly attempt to find a balanced solution through mutual consultation, business-to-business co-operation and public-private partnerships. The main challenge to that respect is that many local communities do not realise the interest value that features of their local community may have to the outside world. It is believed that the “metropolitan” or “regional” dimension of tourism governance, and thus necessarily of cultural strategies, is the key to a more sustainable use of the heritage and cultural assets for community development. A restructured core-periphery visitation pattern benefits the communities involved, in terms of lower pressure levels and crowding of central destinations, of enhanced entrepreneurial capacity in rural areas, and of a more articulated visitor mobility on the territory, rebalancing the costs and revenues generated by tourism and boosting the spin-off potential of tourism in areas with a weak economic basis but rich in culture. On this account, ICT (Information and Communication Technologies) are seen as a promising tool that achieves a number of desirable outcomes: o global access to local cultural knowledge, o interactivity between the local cultural and foreign audiences with the establishment of “cultural empathy” between hosts and guests, o integration of the peripheral tourist areas in the distribution channels of core products, o empowerment and training for entrepreneurs in the cultural industries. The effects of global-urban-rural partnership through e-Strategies are tested in a number of pilot destination regions, including the Catalan and the Galician Communities in Spain and the Veneto Region in Italy. The project will analyse how the introduction of ICT tools for tourism and cultural marketing has changed (or is likely to change) visitors’ attitudes and community involvement for a more sustainable tourism. An attempt will be made at generalising the results providing guidelines for regional managers.

Influence of different iron availability on phosphoenolpiruvate carboxilase and malate dehydrogenase in roots of maize (Zea Mays L.) plants grown under iron deficiency

The effect of the different nitrate availability on some enzymatic activities has been evaluated in iron deficient and iron sufficient maize plants (Zea mays L.). In order to evaluate if the induction of sensitive to pH enzymatic activities is affected by the variation of the apoplast reaction due to the different nitrate availability, two experimental tests were done on maize plants grown in nutrient solution with different NO3- availability and with Fe-sufficiency (+Fe) (added with 80 uM Fe(III)-EDTA) and Fe-deficiency (-Fe) (added with 0.1 uM Fe(III)-EDTA).
As regards 0.4 mM NO3- (NS2), independently of iron availability, phosphoenolpiruvate carboxilase and malate dehydrogenase inductions are higher than those recorded for the experiment with 4.0 mM NO3-. The two activities, for the reaction determined in citosol by NO3- uptake, show different responses according to Fe availability. In NS1 the higher nitrate uptake and the contemporaneous H+ incoming cause in (+Fe) plants a decrease of PEP-carboxilase activation and, during the first 24 hours, of malate dehydrogenase. The shifting of the peak of maximum activity shows that iron deficiency conditions, interfering with e- transport, determinate a slowing down of the enzyme induction, independently of nitrate availability. In NS2, PEPcase is higher under Fe-deficiency and malate dehydrogenase is higher under Fe-sufficiency, both during the first 24 hours.
The different nitrate availability causes a different use of the acid content. In fact, in NS1 citric content, precursor of molecules for the production of phytosiderophores, increased in (-Fe) theses. On the contrary, low nitrate availabilities determined a decrease in acid contents, mostly in (-Fe) theses. This result justifies the higher energy demand to activate membrane carriers under stress conditions for the reduced nitrate availability.
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Creative workers and regional development. Towards a classification of spatial effects

Using data from the Labour Force Surveys in the 2001-2008 period, this paper analyses the evolution in the distribution of “creative professions†as a share of regional workforces (at NUTS2 level), and correlates it with the evolution of p.c. GDP, in different time periods, to test the hypothesis of causal relationship between the two variables, in either direction. It then proposes a regional classification based on the spatial clustering of these effects, which highlights the existence of “national effects†and the relevance of geographical specificities.

Collective intellectual property rights for the development of creative tourist districts: an exploration

In this paper the institution of Collective Intellectual Property Rights (CIPR) is proposed as a regulatory tool for the development of Creative Tourist Districts based on local knowledge and trust, described as a superior organisational model of destinations to alternative models founded on individual property. As there are various types and contexts of applications of CIPR, as well as different development objectives to be achieved, the paper designs a strategy to maximise the expected impacts from case to case. It then proposes “area labels”, based on a combination of controls on quality and delimitation of areas of validity of the right, as the best instrument to foster a strategic orientation to quality across the local tourism industry.