Twin Peaks: Growth and Convergence in Models of Distribution Dynamics
批评传统趋同分析只关注单一经济体是否趋向稳态，转而研究经济体横截面分布的变化，发现持续性与分层、趋同俱乐部形成以及分布极化（形成富国和穷国双峰）等新现象，提示需要不同的理论框架。
Convergence concerns poor economies catching up with rich ones. At issue is what happens to the cross-sectional distribution of economies, not whether a single economy tends towards its own steady state. It is the latter, however, that has preoccupied the traditional approach to convergence analysis. This paper describes an alternative body of research that overcomes this shortcoming in the traditional approach. The new findings - on persistence and stratification; on the formation of convergence clubs; and on the distribution polarizing into twin peaks of rich and poor - suggest the relevance of a class of theoretical ideas different from those surrounding the production-function accounting traditionally favoured.