1. The problem of externalities

Micro economic problems

1. The problem of externalities




The economic problem of pollution

One of the most frequent problems is that economic decisions can have external effects on other people not involved in the transaction. For example, if you produce power from coal, the pollution affects people all over the world (acid rain, global warming). This is a particular problem because we cannot rely on the free market to provide the most efficient outcome. If we create negative externalities, we don’t take them into account when deciding how much to consume. This is why we can get overconsumption of driving a car into a city centre at peak hour. If everyone maximises their utility, it doesn’t lead to the most efficient outcome – but gridlock and wasted resources.

Externalities, usually need some kind of government intervention. For example, taxes on negative externalities (e.g. sugar tax) or subsidies on positive externalities (e.g. free public education) even banning cars in city centres.

But, even the solution to market failure (e.g. taxes), creates its own potential problems, such as how much to tax? will there be tax evasion? The administration costs of collecting tax.