That is held to result when the market suffers from inadequate or inaccurate information delivery, inadequate or insufficient competition, principal-agent problems (where agents fail to represent the interests of their principals), and externalities (where market actors fail to bear the costs of their actions or choices), among other problems.
In it, the therapist describes the child as an apparently "typical 5-year-old by temperament and interests" with no history of mood swings, irritability, depression, attention deficit disorder, learning issues or other problems.