1. Compared to other means, market shares, regions, customers and sales information are easier to measure and thus to easier enforce by firms engaging in collusion.
2. Suppose that a firm's self-interested owners or managers have no moral or ethical qualms and do not anticipate being caught if they agree to participate in a collusive conspiracy. Why might they still decide not to do so if only a moderate revenue gain would result? (How would engaging in the collusion techniques listed in Figure 27-4 affect a conspiring firm's total costs?)