If it's "just basic economics", then you shouldn't have a problem producing those quotes.Honestly, that's just basic economics. It isn't something controversial. What is controversial sometimes is whether a particular externality really exists, whether government should limit itself to the most extreme externalities only, etc. But everybody agrees that it needs to make companies internalize the costs of negative externalities and help them capture the benefits of positive externalities. For example, patent law is a way that the government helps companies capture the benefits of positive externalities.