Hoffman , novak , and yung performed an additional survey on web shopping using a list of features that shoppers found important on the internet .
hoffmannovak和yung使用购物者觉得最重要特征的清单,对网上购物进行了额外研究。
Dennis hoffman , an economics professor at arizona state university 's business school , estimates that more than 2 00000 latinos have left the state in the past year alone .