The new diaspora model of migration incorporates intensity and assortativity and considers only the existing diaspora sizes in the destination to forecast flows.
The ABC of mobility
We model the use of various modes of transport in a city by aggregating Active mobility (A), Public Transport (B) and Cars (C), expressing the modal share of a city by its ABC.
1
Reducing cartel recruitment is the only way to lower violence in Mexico
By 2022, Mexican cartels counted 160,000 to 185,000 units, becoming one of the country’s top employers.
Arguments for building The Circle and not The Line in Saudi Arabia
Saudi Arabia plans to construct a new city, home to 9 million people. The most relevant aspect is its form, a line with a surprising length of 170 km. We analyse whether this is the best plan for a new city and some inconveniences of the prolonged urban form.
Scaling of the morphology of African cities
Based on the location and surface of nearly 200 million buildings on the continent, we estimate the interbuilding distance of almost six thousand cities. Buildings’ footprint data enable the construction of urban form indicators to compare African cities’ elongation, sprawl, …
A Ubiquitous Collective Tragedy in Transport
We explore the individual decision-making processes of commuters using various forms of transport within a city, forming a modal share which is then built into a dynamical model using travel time as the key variable. From a randomised start in …
Detecting cities with high intermediacy in the African urban network
We construct Africa’s urban network obtained from OpenStreetMap road data. City centrality is measured using two indices: by the degree of cities, so the number of roads that connect it, and by the intermediacy, or the number of intracity journeys …
Boosting African cities’ resilience to climate change
Here we estimate the availability of green spaces in 5 625 urban agglomerations in Africa with 10 000 inhabitants and above.
Constructing a simplified interurban road network based on crowdsourced geodata
We present a method to construct a simplified and connected urban network. Some network nodes are cities, and others are “transport nodes” representing road crossings or other types of infrastructure.
Scaling beyond cities
We analyse the scaling behaviour of cities beyond their boundaries by considering the emergence and growth of nearby cities.