Sweezy's work in economics focused on applying Marxist analysis to what he identified as three dominant trends in modern capitalism: monopolization, stagnation, and financialization.
斯威齊的經濟學著作主要聚焦於將馬克思主義的分析應用於他所認為的現代資本主義的三大趨勢：壟斷、停滯與金融化。