Biodiversity provides essential services to human societies. Many of these services are provided as public goods, so that they will typically be underprovided both by market mechanisms (because of the impossibility of excluding non-payers from using the services) and by government-run systems...

I investigate numerically the following question: Given that individuals with different wages disagree over the optimal labour-income tax schedule, how would such disagreements be affected if society restricted itself to using linear tax schedules? I find that there would be (i) a decrease in...