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We study deterrence in sequential move conflicts, modeled as a contest. We bias the model in favor of peace by assuming that under complete information deterrence is achieved and peace prevails. We show that under incomplete information about states' types (resolve) the chances of deterrence decrease rapidly. Studying a uniform type distribution, we show that the finer the type space becomes the more resolve a defending state must have to support deterrence in equilibrium. In the limit, as types occur on a continuum, deterrence is possible only under relatively extreme conditions.

We explore how public opinion polls affect candidates' campaign spending in political competition. Generally, polls lead to (more) asymmetric behavior. Under a majority rule there always exists an equilibrium in which the initially more popular candidate invests more in the campaign and thereby increases her lead in expectation: polls create momentum. When campaigning is very effective and the race is very close, a second type of equilibrium may exist: the trailing candidate outspends and overtakes his opponent. Regardless of the type of equilibrium, polls have a tendency to decrease expected total campaigning expenditures by amplifying ex-ante asymmetries between candidates and thus defusing competition. When candidates care also for their vote share in addition to having the majority, candidates' incentives crucially depend on the distribution of voters' candidate preferences.

We study career choice when competition for promotion is a contest. A more meritocratic profession always succeeds in attracting the highest ability types, whereas a profession with superior promotion benefits attracts high types only if the hazard rate of the noise in performance evaluation is strictly increasing. Raising promotion opportunities produces no systematic effect on the talent distribution, while a higher base wage attracts talent only if total promotion opportunities are sufficiently plentiful.