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  2. Finite water-content vadose zone flow method - Wikipedia

    en.wikipedia.org/wiki/Finite_water-content...

    The finite water-content method solves the advection-like term of the Soil Moisture Velocity Equation, which is an ordinary differential equation alternative to the Richards partial differential equation. The Richards equation is difficult to approximate in general because it does not have a closed-form analytical solution except in a few cases ...

  3. Lindahl tax - Wikipedia

    en.wikipedia.org/wiki/Lindahl_tax

    In a Lindahl equilibrium, the optimal quantity of the public good will be where the social marginal benefit intersects the marginal cost (point P). Each individual's Lindahl tax rate will be based on their own marginal benefit curve. In this model, individual B will pay the price level at R and individual A will pay at point J.

  4. Economic efficiency - Wikipedia

    en.wikipedia.org/wiki/Economic_efficiency

    A market can be said to have allocative efficiency if the price of a product that the market is supplying is equal to the marginal value consumers place on it, and equals marginal cost. In other words, when every good or service is produced up to the point where one more unit provides a marginal benefit to consumers less than the marginal cost ...

  5. Ecological economics - Wikipedia

    en.wikipedia.org/wiki/Ecological_economics

    The marginal costs of a growing economy may gradually exceed the marginal benefits, however measured. Resource and neoclassical economics focus primarily on the efficient allocation of resources and less on the two other problems of importance to ecological economics: distribution ( equity ), and the scale of the economy relative to the ...

  6. Water balance - Wikipedia

    en.wikipedia.org/wiki/Water_balance

    [2] [3] In hydrology, a water balance equation can be used to describe the flow of water in and out of a system. A system can be one of several hydrological or water domains, such as a column of soil, a drainage basin, an irrigation area or a city. The water balance is also referred to as a water budget. Developing water budgets is a ...

  7. Paradox of value - Wikipedia

    en.wikipedia.org/wiki/Paradox_of_value

    In explaining the diamond-water paradox, marginalists explain that it is not the total usefulness of diamonds or water that determines price, but the usefulness of each unit of water or diamonds. It is true that the total utility of water to people is tremendous because they need it to survive; however, since water is in such large supply in ...

  8. Marginalism - Wikipedia

    en.wikipedia.org/wiki/Marginalism

    Marginalism is a theory of economics that attempts to explain the discrepancy in the value of goods and services by reference to their secondary, or marginal, utility. It states that the reason why the price of diamonds is higher than that of water, for example, owes to the greater additional satisfaction of the diamonds over the water.

  9. Static efficiency - Wikipedia

    en.wikipedia.org/wiki/Static_efficiency

    A firm is said to be productively efficieducing at the lowest point on the average cost curve. This is where marginal cost meets average cost. Allocative efficiency takes into account the preferences of the consumers and the efficient allocation of resources. Graphically this point is reached when price is equal to marginal cost.