Valuing Consumer Products by the Time Spent Using Them: An Application to the Internet
提出用消费者使用时间而非价格来评估互联网等免费产品的价值，为经济学研究提供新方法。
Valuing Consumer Products by the Time Spent Using Them: An Application to the Internet by Austan Goolsbee and Peter J. Klenow. Published in volume 96, issue 2, pages 108-113 of American Economic Review, May 2006