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The cobweb model is generally based on a time lag between supply and demand decisions. Agricultural markets are a context where the cobweb model might apply, since there is a lag between planting and harvesting (Kaldor, 1934, p. 133–134 gives two agricultural examples: rubber and corn). Suppose for example that as a result of unexpectedly bad ...
This will tend to put downward pressure on the price to make it return to equilibrium. Likewise where the price is below the equilibrium point (also known as the "sweet spot" [3]) there is a shortage in supply leading to an increase in prices back to equilibrium. Not all equilibria are "stable" in the sense of equilibrium property P3.
Although this cost structure seems unrepresentative of real life transaction costs, it can be used to find approximate solutions in cases with additional assets, [11] for example individual stocks, where it becomes difficult or intractable to give exact solutions for the problem. The assumption of constant investment opportunities can be relaxed.
Another practical examples are the bidding fee auction and the penny raffle (pejoratively known as a "Chinese auction" [6]). Other forms of all-pay auctions exist, such as a war of attrition (also known as biological auctions [ 7 ] ), in which the highest bidder wins, but all (or more typically, both) bidders pay only the lower bid.
The only difference between this definition and the standard definition of a price equilibrium with transfers is in statement (ii). The inequality is weak here making it a price quasi-equilibrium. Later we will strengthen this to make a price equilibrium. [38]
Under the APT, an asset is mispriced if its current price diverges from the price predicted by the model. The asset price today should equal the sum of all future cash flows discounted at the APT rate, where the expected return of the asset is a linear function of various factors, and sensitivity to changes in each factor is represented by a ...
The Stackelberg model can be solved to find the subgame perfect Nash equilibrium or equilibria (SPNE), i.e. the strategy profile that serves best each player, given the strategies of the other player and that entails every player playing in a Nash equilibrium in every subgame.
In mathematical economics, the Arrow–Debreu model is a theoretical general equilibrium model. It posits that under certain economic assumptions (convex preferences, perfect competition, and demand independence), there must be a set of prices such that aggregate supplies will equal aggregate demands for every commodity in the economy.