Internet Job Search and Unemployment Durations
利用1998年12月和2000年8月的CPS计算机与互联网补充数据，研究哪些失业者上网找工作，以及互联网搜索者是否更快再就业。发现互联网搜索者失业时间更短，但控制可观测特征后差异消失甚至逆转，表明互联网求职可能无效或存在不可观测的负向选择。
Using the December 1998 and August 2000 CPS Computer and Internet Supplements matched with subsequent CPS files, we ask which types of unemployed workers looked for work on line and whether Internet searchers became reemployed more quickly. In our data, Internet searchers have observed characteristics that are typically associated with shorter unemployment spells, and do spend less time unemployed. This unemployment differential is however eliminated and in some cases reversed when we hold observable characteristics constant. We conclude that either Internet job search is ineffective in reducing unemployment durations, or Internet job searchers are negatively selected on unobservables.