Analysis of information sources in references of the Wikipedia article "Tulip mania" in English language version.
Probably the most famous absentee from our study is the Dutch Tulipmania of 1636–7, which witnessed the rapid price appreciation of rare tulip bulbs in late 1636, followed by a 90 per cent depreciation in bulb prices in February 1637. This is excluded for the simple reason that the price reversal was exclusively confined to a thinly traded commodity, with no associated promotion boom and negligible economic impact. In other words, the Tulipmania was too unremarkable to merit inclusion. Although the wild fluctuations in price are striking, they are not unusual for markets in rare and unusual goods, particularly those predominantly used to signal status. In the case of the Tulipmania these fluctuations were compounded by legal ambiguity over the status of futures contracts, suggesting that the price movements may have had a somewhat mundane explanation.
