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Finance and Stochastics
Article . 2024 . Peer-reviewed
License: Springer Nature TDM
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Article . 2024
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https://dx.doi.org/10.48550/ar...
Article . 2022
License: arXiv Non-Exclusive Distribution
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Existence of an equilibrium with limited participation

Authors: Weston, Kim;

Existence of an equilibrium with limited participation

Abstract

A limited participation economy models the real-world phenomenon that some economic agents have access to more of the financial market than others. We prove the global existence of a Radner equilibrium with limited participation, where the agents have exponential preferences and derive utility from both running consumption and terminal wealth. Our analysis centers around the existence and uniqueness of a solution to a coupled system of quadratic backward stochastic differential equations (BSDEs). We prove that the BSDE system has a unique $\mathcal{S}^\infty\times\text{bmo}$ solution. We define a candidate equilibrium in terms of the BSDE solution and prove through a verification argument that the candidate is a Radner equilibrium with limited participation. This work generalizes the model of Basak and Cuoco (1998) to allow for a stock with a general dividend stream and agents with exponential preferences. We also provide an explicit example.

Keywords

Stochastic models in economics, Financial markets, BMO-martingale, Probability (math.PR), Applications of stochastic analysis (to PDEs, etc.), Mathematical Finance (q-fin.MF), FOS: Economics and business, Quantitative Finance - Mathematical Finance, limited participation, multidimensional BSDE, FOS: Mathematics, incomplete Radner equilibrium, diagonally quadratic generator, Mathematics - Probability

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Top 10%
Average
Average
Green