Papers › Asymptotic approximation of the likelihood of stationary determinantal point processes
Asymptotic approximation of the likelihood of stationary determinantal point processes
Arnaud Poinas, Frédéric Lavancier
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Continuous determinantal point processes (DPPs) are a class of repulsive point processes on ℝᵈ with many statistical applications. Although an explicit expression of their density is known, it is too complicated to be used directly for maximum likelihood estimation. In the stationary case, an approximation using Fourier series has been suggested, but it is limited to rectangular observation windows and no theoretical results support it. In this contribution, we investigate a different way to approximate the likelihood by looking at its asymptotic behaviour when the observation window grows towards ℝᵈ. This new approximation is not limited to rectangular windows, is faster to compute than the previous one, does not require any tuning parameter, and some theoretical justifications are provided. It moreover provides an explicit formula for estimating the asymptotic variance of the associated estimator. The performances are assessed in a simulation study on standard parametric models on ℝᵈ and compare favourably to common alternative estimation methods for continuous DPPs.
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