  We restrict our attention to space-time point pattern data for which we have
a single realisation within a finite region. Second-order characteristics are
used to analyse the spatio-temporal structure of the underlying point process.
In particular, the space-time inhomogeneous pair correlation function and
$K$-function measure the spatio-temporal clustering/regularity and the
spatio-temporal interaction, and thus help with model choice. Non-parametric
estimators of the second-order characteristics require information from outside
the study region, resulting to the so-called edge effects which have to be
corrected, and depend on first-order characteristics, which have to be
estimated in practice. Here, we extend classical edge correction factors to the
spatio-temporal setting and compare the performance of the related estimators
for stationary/non-stationary and/or isotropic/anisotropic point patterns.
Then, we explore the influence of estimated intensity function on these
estimators.
