He referred extensively to the entrepreneur in his writings. As a general principle he believed that entrepreneurscarry out all the production, coordinating, and exchange functions in a market economy. He declared that entrepreneurs were more important than landlords and that they were really the pivotal force in national growth. But because he was more a speculator himself, Cantillon neither understood nor commented on the production process itself and the input-output factors associated with it. This was taken up by Jean-Baptiste Say