Pigouvian tax in the context of "Hamiltonian economic program"

A tax is a mandatory financial charge or levy imposed on an individual or legal entity by a governmental organization to support government spending and public expenditures collectively or to regulate and reduce negative externalities. Tax compliance refers to policy actions and individual behavior aimed at ensuring that taxpayers are paying the right amount of tax at the right time and securing the correct tax allowances and tax relief. The first known taxation occurred in Ancient Egypt around 3000–2800 BC. Taxes consist of direct or indirect taxes and may be paid in money or as labor equivalent.

All countries have a tax system in place to pay for public, common societal, or agreed national needs and for the functions of government. Some countries levy a flat percentage rate of taxation on personal annual income, but most scale taxes are progressive based on brackets of yearly income amounts. Most countries charge a tax on an individual's income and corporate income. Countries or sub-units often also impose wealth taxes, inheritance taxes, gift taxes, property taxes, sales taxes, use taxes, environmental taxes, payroll taxes, duties, or tariffs. It is also possible to levy a tax on tax, as with a gross receipts tax.

An environmental tax, ecotax (short for ecological taxation), or green tax is a tax levied on activities which are considered to be harmful to the environment and is intended to promote environmentally friendly alternatives via economic incentives. One notable example is a carbon tax. Such a policy can complement or avert the need for regulatory (command and control) approaches. Often, an ecotax policy proposal may attempt to maintain overall tax revenue by proportionately reducing other taxes (e.g. taxes on wages and income or property taxes); such proposals are known as a green tax shift towards ecological taxation. Ecotaxes address the failure of free markets to consider environmental impacts.

Ecotaxes are examples of Pigouvian taxes, which are taxes on goods whose production or consumption creates external costs or externalities. An example might be philosopher Thomas Pogge's proposed Global Resources Dividend.

A sugary drink tax, soda tax, or sweetened beverage tax (SBT) is a tax or surcharge (food-related fiscal policy) designed to reduce consumption of sweetened beverages by making them more expensive to purchase. Drinks covered under a soda tax often include carbonated soft drinks, sports drinks and energy drinks. Fruit juices without added sugar are usually excluded, despite similar sugar content, though there is some debate on including them.

This policy intervention is an effort to decrease obesity and the health impacts related to being overweight. The tax is a matter of public debate in many countries and beverage producers like Coca-Cola often oppose it. Advocates such as national medical associations and the World Health Organization promote the tax as an example of a Pigouvian tax, aimed to discourage unhealthy diets and offset the growing economic costs of obesity.