Li , Minqi, Feng Xiao, and Andong Zhu. “LONG WAVES, INSTITUTIONAL CHANGES, AND HISTORICAL TRENDS: A STUDY OF THE LONG-TERM MOVEMENT OF THE PROFIT RATE IN THECAPITALIST WORLD-ECONOMY”. Journal of World-Systems Research 13, no. 1 (February 26, 2007): 33-54. Accessed August 4, 2020. http://jwsr.pitt.edu/ojs/jwsr/article/view/360.