On 11: Population Control. I'd argue that this is a specific instance in which market economics by themselves do not suffice to solve the problem -- unless you

On 11: Population Control. I'd argue that this is a specific instance in which market economics by themselves do not suffice to solve the problem -- unless you regard it as acceptable that miscalculations on the part of parents, such as having one too many kids, should result in one of the kids being allowed to starve to death years down the road. Probably the best solutions are going to involve lots of market incentives, and what they are going to be is what the question is asking.