Laptops and Externalities in the Classroom

These are the two datasets used for the paper "Do Laptops in the Classroom Produce Negative Externalities? Evidence from a Classroom Field Experiment". One has the level version of the "exposure" variable, and the other has the squared version.

本数据集为论文《课堂中的笔记本电脑会产生负外部性吗？一项课堂实地实验的证据》所使用的两套数据集。其中一套包含“暴露（exposure）”变量的水平值形式，另一套则包含该变量的平方值形式。