A fair and _competitive_ market is probably best, yet the constraints of both fair and competitive matter. For example, it should be possible for a new entrant

A fair and _competitive_ market is probably best, yet the constraints of both fair and competitive matter. For example, it should be possible for a new entrant to compete in a market; but among other issues can fail with network effects (things tend to be cheaper in bulk), vendor lock-in (either literal or inertia), or credibility / quality concerns. Competition can also be regulated out of a market with barriers to entry or a lack of (space for) alternatives. Regulations related to what type of housing can be built in an area, areas to build housing, transit options, etc. An open, transparent, regulation and management of a market should strive to provide the best results for the people, and very clear to follow guidance about the needs of the people that can be fulfilled by offering more or better services. Resources those services utilize should also have clear and easy to comply with regulations. As an example; a location rated for use as a given type of building shouldn't need a complicated environmental impact assessment, rather the proposed use and construction methods should be compared to an already allowed impact with a pass / remediation / fail criteria.