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The Pareto-Positive Stable (PPS) distribution is introduced as a new model for describing city size data of a region in a country. The PPS distribution provides a flexible model for fitting the entire range of a set of city size data and the classical Pareto and Zipf distributions are included as a particular case.

An Evaluation of Pareto, Lognormal and PPS Distributions: The Size Distribution of Cities in Kerala, India