Difference in actual willingness to pay and willingness to pay revealed in a survey arising from the choice of a payment instrument for a survey. Vehicles include changes in local taxes, entrance fees [..]

A principle of taxation in which taxes are based on the income or resource-ownership ability of people to pay the tax. The income tax is one of the most common taxes that seeks to abide by the ability [..]

The ability of a producer to produce a higher absolute quantity of a good with the productive resource available.

The precipitation of dilute solutions of strong mineral acids, formed by the mixing in the atmosphere of various industrial pollutants -- primarily sulfur dioxide and nitrogen oxides -- with naturally [..]

Underground source of water

resources a country builds for itself, like a network of roads or an educated population

expectations based on the extrapolation of events in the recent past into the future

principle that says that those who most want to buy insurance tend to be those most at risk, but charging a high price for insurance (to cover the high risk)will discourage those at less risk from buy [..]

a curve relating the total demand for the economy's goods and services at each price level, given the level of wages

a curve that traces out the relationship between expenditures--the sum of consumption, investment, government expenditures, and net exports--and the national income, at a fixed price level