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"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

I like talking to a brick wall, it’s the only thing in the world that never contradicts me.

Materials should be allowed to speak for themselves.

處理一個(gè)不自由的世界的唯一方法是變得如此絕對(duì)自由，以至于你的存在本身就是一種反叛。

La música es el lenguaje universal que nos une a todos.