Second-order analysis of inhomogeneous spatio-temporal point process data

Second-order methods provide a natural starting point for the analysis of spatial point process data. In this note we extend to the spatio-temporal setting a method proposed by Baddeley et al. [Statistica Neerlandica (2000) Vol. 54, pp. 329–350] for inhomogeneous spatial point process data, and apply the resulting estimator to data on the spatio-temporal distribution of human Campylobacter infections in an area of north-west England.