美国经济学家约翰·李斯特2024年芝加哥大学毕业演讲：改变世界的三个小秘密！（英文全文）
There's my sign. Welcome, welcome, welcome, friends and colleagues. I am humbled. I am deeply honored to be here today. Paul, thank you so much. It is fantastic to share this moment with all of you. To the brilliant ...