The September 2022 issue of Networks addresses both theoretical and algorithmic advances for a variety of network optimization problems. The specific contributions detailed in this issue include
• analysis of the effects of edge addition/removal on community structure (modularity) in networks,
• comparison of node/edge-based models for the Steiner tree problem with hop constraints,
• formulation and solution of multivisit drone routing problems with edge launches,
• analysis of maximum flow value through specified vertices and relation to group centrality measures,
• use of convex envelopes to design series-parallel networks achieving maximum all-terminal reliability,
• iterated local search to determine a tree whose interleaf distances best approximate a given distance matrix.
Two of these articles are published Open Access.
This issue also includes an announcement of the 2021 Glover-Klingman Prize, awarded to Ivana Lubić for her article "Solving Steiner trees: Recent advances, challenges, and perspectives".
We trust that the readership of INFORMS will find these articles to be of interest.
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Douglas Shier
Bruce Golden
Editors-in-Chief, Networks
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