After a few years, Jacob Mincer joined the Columbia department and became co-director of the workshop.

几年后，雅各布·明赛尔加入哥伦比亚大学，成为小组的副指导。

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Study co-author Jacob Vigdor said the findings suggest access to computers can harm children's learning.

研究合著者Jacob Vigdor说结果显示使用电脑危害儿童的学习能力。

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Study co-author Jacob Vigdor said the findings suggest access to computers can harm children's learning.

研究合著者Jacob Vigdor说结果显示使用电脑危害儿童的学习能力。

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