Migration is an important aspect of human society. It has existed throughout history, but in modern times it takes a new form. We propose a new approach to the world migration phenomenon as two complex directed networks (immigration and emigration) were countries represents network nodes, and...

According Zipf's Law, city sizes follow a Pareto distribution, with the rank (R) of a city i being proportional to its size (S): R(i)=A*S-α or ln(R) = ln(A)-α*ln(S), where α is a slope gradient or Pareto parameter, varying around 1. However, several empirical studies, carried out to...

List of figures -- List of tables -- Preface -- Acknowledgements -- Preamble -- Prerequisites and foundations -- Building a science of cities -- EBB and flow : interaction, gravity, and potential -- Connections and correlations : the science of networks -- The science of cities -- The growth of...