This paper develops a model which contains agglomeration economies, time variable and is based on both demand-side and supply side considerations and microeconomic foundations. The simulation result indicates that the proposed model can dynamically describe both monocentric and polycentric...

Many things in the natural world consist of an ever-larger number of ever-smaller pieces. This is called a fractal, which implies both the power law and rank size rule. Various models have been applied to explain the power law or Zipf’s law in the distribution of city size. Gibrat’s law...