There are two key stylised facts about the extinction patterns of firms. First, the probability of extinction is highest at the start of the firm"s existence, but soon becomes more or less invariant to the age of the firm. Second, the relationship between the size and frequency of firm...

We observe a marked increase in the spatial homogeneity of the popularity of first names across the United States in recent decades. We explain this by calibrating a modified standard model of neutral cultural evolution to the record of first name popularities for the United States as a whole...