This paper studies a liberalized postal market where entrants may offer end-to-end products or concentrate on one of the segments of the network. Absent effective bypass, entry does not appear to be a serious financial threat to the incumbent, even when the products are perfect substitutes. This...

Overlapping ownership has contrasting effects on capacity investments if duopoly firms invest sequentially. The follower’s reaction is less aggressive, but the leader acts more aggressively, either by choosing larger capacities or by shifting from accommodation to deterrence. If it shifts the...

We study how overlapping ownership affects the timing and size of capacity investments in duopoly. In addition to standard accommodation and delay strategies, internalization allows a leader to block follower entry. Follower timing and capacity reactions are less aggressive, making outcomes less...