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In financial economics, a state-price security, also called an Arrow–Debreu security (from its origins in the Arrow–Debreu model), a pure security, or a primitive security is a contract that agrees to pay one unit of a numeraire (a currency or a commodity) if a particular state occurs at a particular time in the future and pays zero numeraire in all the other states.
In economics the production set is a construct representing the possible inputs and outputs to a production process. A production vector represents a process as a vector containing an entry for every commodity in the economy. Outputs are represented by positive entries giving the quantities produced and inputs by negative entries giving the ...
A certain total economic output x is required to satisfy a given level of final demand y. This final demand may be domestic (for private households as well as the public sector) or foreign (exports) and can be written as an n×1 vector. When this vector of final demand y is multiplied by the Leontief inverse (I−A) −1, we obtain total output ...
A competitive equilibrium is a price vector and an allocation in which the demands of all agents are satisfied (the demand of each good equals its supply). In a linear economy, it consists of a price vector and an allocation , giving each agent a bundle such that:
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In finance, a position is the amount of a particular security, commodity or currency held or owned by a person or entity. [1]In financial trading, a position in a futures contract does not reflect ownership but rather a binding commitment to buy or sell a given number of financial instruments, such as securities, currencies or commodities, for a given price.
A security deposit is a sum of money held in trust. [ 1 ] In leasing, security deposits, also known as "rent deposits", [ 2 ] are required most often by lessors of automobiles , residential property, and commercial real estate .
But in 1982 Jordi Andreu established an important preliminary result suggesting that this was the case, [9] and in 1999 Pierre-André Chiappori and Ivar Ekeland used vector calculus to prove that the Sonnenschein–Mantel–Debreu results do indeed apply to the market demand curve.