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Stable features and changing aspects of Italian migration abroad in recent years.

For decades the migratory phenomenon has been a constant feature in Italian economic development, and the numerous Italian communities, now well established in various foreign countries, are testimony to that historical dimension. Taking into account Italian statistical information, the author analyzes the main aspects of the Italian communities abroad and points out the stable features and changing aspects of the migratory streams in recent times. Concluding remarks deal with some measures that would be necessary to adopt in the future both towards the Italian communities abroad and in the field of the actual different types of migrants. As to data problems, even if Italian statistical information seems to indicate the basic trends, it fails to provide complete data regarding the actual size of the phenomenon. An international agreement seems to be the most pressing requisite at present for a harmonious flow of information based on a standard collection criteria.

Demography↗
PubMed1987

Long-run urban growth with agglomeration economies.

"It is widely recognized that agglomeration economies are a crucially important factor in explaining the existence and growth of urban areas, and therefore should be explicitly taken into consideration in long-run urban growth analysis. Once such economies are introduced, however, the urban economy tends to diverge from a steady state equilibrium and may 'explode' without limit. A possible way to solve this dilemma is shown. First, a simple urban growth model with production and factor migration functions in the presence of agglomeration economies is set up....Then, land is introduced to show that the availability of the third factor of production will make it more likely to achieve a steady growth equilibrium in the presence of agglomeration economies. Last, the model is generalized to include many factors of production."

Agriculture↗
PubMed1992

Lethal model 2: the limits to growth revisited.

The author examines some major concerns about global economic growth from both theoretical and empirical points of view, using "the limits-to-growth debate as a reference point to understand the earlier debate about the limits to and perils of growth, and to provide some perspective about the newer debate about environmental threats." He concludes that environmental and resource constraints on economic growth should be modest over the next 50 years and that economic growth is possible providing emphasis is given to "the importance of careful scientific and policy analysis and establishing or strengthening institutions that contain incentives that are compatible with the thoughtful balancing of long-run costs and benefits of social investments."

Conservation of Natural Resources↗