... language has evolved in the service of particular human needs ... what is really significant is that this functional principle is carried over and built into the grammar, so that the internal organization of the grammar system is also functional in character. Michael Halliday
Because internal organization experiences added bureaucratic costs, the firm is usefully thought as the organization of last resort: try markets, try hybrids (long term contractual relations into which security features have been crafted), and resort to firms when all else fails. Oliver E. Williamson