What is the enterprise boundary?

Vertical boundary: the scope of activities engaged by enterprises and the scope of activities purchased from the market. Overall boundary: the collection of a series of different businesses that enterprises compete for. Diversified boundaries: An enterprise is a borderless organization. In the past, it was thought that enterprises had boundaries, but later, when they developed, enterprises became borderless. Later, the enterprise has both boundaries and no boundaries, and the boundaries are blurred, and everything is blurred. Now it seems that the marginal cost of an enterprise is less than the marginal revenue, or the marginal cost is zero if it is multiplied by the marginal revenue. If the marginal revenue remains unchanged, the law of increasing marginal cost and marginal revenue plays a leading role, that is, the boundary can be infinite, which is of great significance to enterprise management.