A paradox in the global description of the multiverse

@article{Bousso2007API,
  title={A paradox in the global description of the multiverse},
  author={Raphael Bousso and Ben Freivogel},
  journal={Journal of High Energy Physics},
  year={2007},
  volume={2007},
  pages={018-018}
}
We use an argument by Page to exhibit a paradox in the global description of the multiverse: the overwhelming majority of observers arise from quantum fluctuations and not by conventional evolution. Unless we are extremely atypical, this contradicts observation. The paradox does not arise in the local description of the multiverse, but similar arguments yield interesting constraints on the maximum lifetime of metastable vacua. 

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