First-Mover Advantage
What is First-Mover Advantage?
First-mover advantage is the gain a player wins by committing to a move before rivals, so they must take that choice as given and react to it.
When a game is sequential and the first move is visible and hard to reverse, the first player effectively chooses which outcome the game will settle on, and the follower is left picking the best available reply. In business the commitment usually takes the form of building capacity, locking up shelf space or distribution, or setting a standard that customers and suppliers then build around. Network effects can lock the advantage in, since each additional user makes the leader's product more valuable to the next one. The advantage is not automatic, though. A second mover can copy a proven design, skip the leader's research bill, and learn from mistakes the leader had to pay for, which is why some industries reward waiting.
First-Mover Advantage: a worked example
Two chains pick a store size, Big or Small, with payoffs written (leader, follower): Big against Big gives (3, 2), Big against Small gives (7, 4), Small against Big gives (4, 8), and Small against Small gives (5, 5). If the leader commits to Big, the follower takes 4 by going Small rather than 2 by going Big, leaving the leader 7. If the leader commits to Small, the follower takes 8 by going Big, leaving the leader only 4. So the leader builds Big. Played at the same time the game has two equilibria, (7, 4) and (4, 8); moving first is what lets the leader select the one it prefers.
The mistake students make with first-mover advantage
The usual mistake is treating first-mover advantage as a rule that moving first always pays. It only pays when the move is visible to rivals and expensive to undo; an announcement that can be quietly reversed changes nobody's behavior. In games where the rival can tailor its reply, such as setting a price the rival can then undercut, going first is a handicap. Whether the leader or the follower gains is a question you answer from the payoffs.
First-Mover Advantage questions
Why does moving first give an advantage?
Moving first gives an advantage when the choice cannot be undone, because the rival must then optimize against a decision that is already fixed. That effectively lets the first mover choose which of the game's outcomes will occur. The advantage disappears if the rival cannot see the move or knows it can be reversed.
What is second-mover advantage?
Second-mover advantage is the gain from letting someone else go first and then improving on what they did. The follower can copy a design that has already been tested, avoid the research and market-education costs, and target the weaknesses customers complained about. It tends to matter most where imitation is cheap and switching is easy for customers.
Is first-mover advantage the same as a credible threat?
No, but they rest on the same idea, which is commitment. A credible threat is about what you will do in response to a rival's move, while first-mover advantage is about acting before the rival moves at all. Both only work when the commitment is visible and hard to reverse.
Related terms
Common comparisons
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