IYLM: a comment
评论了Rod O’Donnell和Colin Rogers提出的IYLM模型，认为它并不比ISLM模型更符合凯恩斯理论，因为两者的唯一区别是投资函数，而凯恩斯的讲座和《通论》初稿证据与IYLM的投资函数相矛盾。
The central thesis of this comment is that the IYLM model presented by Rod O’Donnell and Colin Rogers is not more compatible with Keynes’s theory than the ISLM model. The investment function is the only difference between IYLM and ISLM. Evidence from Keynes’s lectures and mid-1934 draft of the General Theory contradicts the IYLM investment function.