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Published online by Cambridge University Press: 25 October 2023
We study in a general graph-theoretic formulation a long-range percolation model introduced by Lamperti [27]. For various underlying digraphs, we discuss connections between this model and random exchange processes. We clarify, for all $n \in \mathbb{N}$, under which conditions the lattices
$\mathbb{N}_0^n$ and
$\mathbb{Z}^n$ are essentially covered in this model. Moreover, for all
$n \geq 2$, we establish that it is impossible to cover the directed n-ary tree in our model.