The economist 09-4-24(14)

经济学人

[2009.04.16] Googling the future Google

一下未来 Economic indicators 经济指标

Googling the future Google一下未来

Apr 16th 2009

From The Economist print edition

Internet search data may be useful for

forecasters

网络搜索数据也许可以帮助经济预测专家

CLAIMS of clairvoyance, particularly when they come from economists, deserve a sceptical reception. Hal Varian, a professor of economics at the University of California, Berkeley who also happens to be Google’s chief economist, has no such pretensions, but he does believe that data on internet searches can help predict certain kinds of economic statistics before they become available.

人们具有预见能力的这一说，尤其是经济学家的预见能力通常都会引起质疑。加州大学伯克利分校的经济学教授，谷歌公司首席经济学家Hal Varian表示，他没有如此的洞察力和预见力，但他相信在某些经济统计数据公布之前，网络搜索的数据能够帮助预测这些数据。

In a new paper written with Hyunyoung Choi, a colleague at Google, he argues that fluctuations in the frequency with which people search for certain words or phrases online can improve the accuracy of the econometric models used to predict, for example, retail-sales figures or house sales. Actual numbers for such things are usually available only with a lag. But Google’s search data