"We know that it is a risk factor but we can't attribute the rise in autism to the shifting trend towards having children later in life."

VOA: standard.2010.02.10

Well, there are many factors, but one important factor is, the rise of the Internet has competed with -people used to buy The Wall Street Journal to get data like this.

其实有很多因素,但是最主要一点是,来自网络的竞争,人们过去买《华尔街日报》来获取这些数据

耶鲁公开课 - 金融市场课程节选

That was an important factor behind the rise in the jobless rate.

WSJ: U.S. Economy Adds 69,000 Jobs; Unemployment Rate Rises to 8.2%

Cherry noted that there has been more awareness of pertussis in recent years, which may also factor into a rise in reported cases.

CNN: Vaccination role unclear in whooping cough outbreak

He also points to the increasing trend of free shipping and returns from online retailers as a factor in the rise in his--and all online--sales.

FORBES: Time