Levitt examined various "natural experiments", ie those events that are not really designed as an experiment, but have exactly this character due to the circumstances, for example if the said Bagel seller's goods now issuing offices of top management or a simple office worker. The interesting thing is the unusual examples, which are thereby used, for example, under what circumstances sumo wrestlers take fight collusion or as the income structure of a drug gang looks, and the unorthodox way of thinking with which Levitt examined these. Of course, reading the book ranges from no means in order to automatically create sophisticated statistics that curiosity in mind, however, aroused and in the end is indeed the entertainment at the center, otherwise one could also equal to a "real" reading statistics book. The reading is worthwhile if only because of the unusual stories that are presented by Levitt.
Overall a very entertaining book, the statistics do look sexy!