The average amount American consumers say they paid for a book has declined around 40% since 2009, from $15.45 in 2009 to $9.31 last year. But publishing remains a profitable business. Our essay on the future of the book. http://econ.st/1u7vnKM
在同亚马逊的拼搏中，德国书业并没有衰落下去。正相反。
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