He quotes Ronald Coase, the Nobel laureate in economics: There are a number of transaction costs to using the market; the cost of obtaining a good or service via the market is actually more than just the price of the good. Other costs, including search and information costs, bargaining costs, keeping trade secrets, and policing and enforcement costs, can all potentially add to the cost of procuring something with a firm. This suggests that firms will arise when they can arrange to produce what they need internally and somehow avoid these costs.
