"I’m from the Deep State and I’m here to help"
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"How the Aspiring Can Learn to Write Like Economists"

A summary of John Cochrane's 15 writing tips aimed at Ph.D. students although they apply to pretty much everyone. These two are especially good:

1. Scarcity: “As economists, we teach our students about scarcity. As authors, we should remember that time is a scarce resource. That means taking out all of the easily ignored details and stressing the big ideas.” 

. . . 

11. Responsibility: “Much bad writing comes down to trying to avoid responsibility for what you’re saying.”