The last 50 years in growth theory and the next 10
回顾了新古典增长理论的主要成就与未解问题，评述了内生增长理论和跨国截面因果推断的优缺点，并批评了将规范性的拉姆齐模型当作适用于所有频率的实证模型的倾向。
This article offers a personal view of the main achievements of (broadly) neoclassical growth theory, along with a few of the important gaps that remain. It discusses briefly the pluses and minuses of two major recent lines of research: endogenous growth theory and the drawing of causal inferences from international cross-sections, and criticizes the widespread contemporary tendency to convert the normative Ramsey model into a positive representative-agent macroeconomic model applying at all frequencies. Finally, it comments on the articles appearing in this symposium.