Technological changes afforded a development in the agricultural productivity, making use of less resources and producing more out of it. Aiming to analyze if the boundaries the firm (soy producer) were altered due to technological changes (GMO soy). The evolution of soy production was compared and related to: the use of credit loans for covering costs; the amount of contracts related to rural loans; and the area for farming soy using rural credit. The results confirm the “Penrosian” conceptual, that the decreasing incomes may be overcome by the firm’s capacity to adapt its structure to new production conditions. So, it is possible to state that soy producer in Brazil were benefited with the opportunities brought about by the technological economy.