二、如何选择 经济学的研究对象 三大基本经济问题 What is to be produced? How is to be produced? Who does get the output?二、如何选择 ——经济学的研究对象 ◼三大基本经济问题: ◼What is to be produced? ◼How is to be produced? ◼Who does get the output?