Economist and Wharton professor Katy Milkman has spent a lot of time figuring out why people decide to change – and how they actually do it. Through a great conversation about everything from friendships to the power of “Twilight,” Milkman gives Meredith an honest take on what we can expect from ourselves, and how we can help others evolve ... when they want to. Meet Milkman, author of "How To Change."

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