Climate change exacerbates desertification forcing millions of rural people to urbanize, especially in developing countries. Our quantitative analysis across African countries highlights migrants’ two typical sequential moves: i) people escape from villages to cities; ii) through cities’...

The closure of borders between countries in the wake of the outbreak of the coronavirus COVID-19 suspended the flows of the international labor migration, thus creating risks to the agriculture, particularly, fruit farming and horticulture. In this survey, the information is presented on the...

Since the mid 1980’s, Sustainable Development as a term has been made prominent and played a central role in discussions about environmental policies, academic studies and governmental initiatives. Overtime, Sustainable development has been seen to be primarily centered on society and its...

The objective of this article is to explore the emergence of cognitive cities as the next step in urban development and to provide insights to city planners and administrators on how to create a connected and efficient physical environment that serves its citizens. By examining the key features...

The past thirty years have seen a dramatic decrease in the rate of income convergence across states and in population flows to wealthy places. These changes coincide with (1) an increase in housing prices in productive areas, (2) a divergence in the skill-specific real returns to living in...

A question frequently posed in Russia amid the economic and social anarchy of the post socialist period is whether it might not be better off if it followed the Chinese model of transition. This latter might be described in broad terms as a very slow liberalisation of the political system with a...

The paper combines an economic-geography model of agglomeration and periphery with a model of species diversity and looks at optimal policies of biodiversity conservation. The subject of the paper is "natural" biodiversity, which is inevitably impaired by anthropogenic impact. Thus, the economic...

We consider two types of cities. In the European one the amenities are located at the city-center (like e.g. Paris or London) whereas in the American-type city the amenties are at the city-edge (like e.g. Detroit, Los Angeles). We first show that the unemployed reside at the vicinity of the...

The paper combines an economic-geography model of agglomeration and periphery with a model of species diversity and looks at optimal policies of biodiversity conservation. The subject of the paper is "natural" biodiversity, which is inevitably impaired by anthropogenic impact. Thus, the economic...

We develop a model where the unemployed workers in the city can find a job either directly or through weak or strong ties. We show that, in denser areas, individuals choose to interact with more people and meet more random encounters (weak ties) than in sparsely populated areas. We also...