9 research outputs found
Recommended from our members
A power law distribution in patients' lengths of stay in hospital
The distribution of patients' lengths of stay in English hospitals is measured by using routinely
collected data from 11 years. It is found to be well approximated by a power law distribution
spanning over more than 3 decades. To explain this observation, a theoretical resource allocation
model is presented. It is based on iterative long-term scheduling of hospital beds, and its main
assumption is that future beds are allocated preferentially. This represents a situation where
di®erent parts of the health care system compete for resources, with bargaining powers proportional
to current resource levels
The urban economy as a scale-free network
We present empirical evidence that land values are scale-free and introduce a
network model that reproduces the observations. The network approach to urban
modelling is based on the assumption that the market dynamics that generates
land values can be represented as a growing scale-free network. Our results
suggest that the network properties of trade between specialized activities
causes land values, and likely also other observables such as population, to be
power law distributed. In addition to being an attractive avenue for further
analytical inquiry, the network representation is also applicable to empirical
data and is thereby attractive for predictive modelling.Comment: Submitted to Phys. Rev. E. 7 pages, 3 figures. (Minor typos and
details fixed