Sterner discusses criteria important to consider when evaluating policy instruments, such as effectiveness, fairness, political feasibility, costs and so on. The same goes for the given conditions, who suffers from, lets say, the emissions? Who will suffer the abatement costs? What uncertainty/risks are there? What does the market look like, is there a monopoly/oligopoly? And so on.
Sterner also presents some real world examples where different methods have been implemented and evaluates the outcome of the different policy instruments used.