deletions | additions       diff --git a/layout.md b/layout.md  index 0d0874b..3bf20a4 100644  --- a/layout.md  +++ b/layout.md 
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Protection_causes_inefficiency_Discussion_about__.md  Costs_of_free_trade_Disruption__.md  Virtuous_circle_of_free_trade__.md  Trade_and_change_Trade_contributes__.md Trade_and_change_Discussion_about__.md  Lecture_19_I_think_this__.md