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This was controlled for by the native students, who also experienced any improvement in the city's environment, but did not experience the ban.
by scott00 9y ago
This was controlled for by the native students, who also experienced any improvement in the city's environment, but did not experience the ban.
- hug 9y agoNot entirely. The students who were banned were those visiting from out of country so it's possible to argue that the students performance is increased by preventing them from being drug-tourists. Not sensible, but possible.
- deleted 9y ago[deleted]