The article explores Marx's economic ideas in "Capital" and their relevance to post-Keynesian economics. It delves into topics like economic reproduction, the labor theory of value, long-term economic growth, technical change, and the falling rate of profit. The researchers analyze how capitalism functions, the impact of technological advancements on profits, and the dynamics of income distribution and class struggle. They also discuss the economic cycle and monetary theory as outlined in "Das Kapital".