markov equilibrium
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Econometrica ◽  
2021 ◽  
Vol 89 (4) ◽  
pp. 1979-2010 ◽  
Author(s):  
Manuel Amador ◽  
Christopher Phelan

This paper presents a continuous‐time model of sovereign debt. In it, a relatively impatient sovereign government's hidden type switches back and forth between a commitment type, which cannot default, and an opportunistic type, which can, and where we assume outside lenders have particular beliefs regarding how a commitment type should borrow for any given level of debt and bond price. In any Markov equilibrium, the opportunistic type mimics the commitment type when borrowing, revealing its type only by defaulting on its debt at random times. The equilibrium features a “graduation date”: a finite amount of time since the last default, after which time reputation reaches its highest level and is unaffected by not defaulting. Before such date, not defaulting always increases the country's reputation. For countries that have recently defaulted, bond prices and the total amount of debt are increasing functions of the amount of time since the country's last default. For countries that have not recently defaulted (i.e., those that have graduated), bond prices are constant.


2010 ◽  
Vol 100 (1) ◽  
pp. 337-363 ◽  
Author(s):  
Xavier Mateos-Planas

This article studies the effects of demographics on the mix of tax rates on labor and capital. It uses a quantitative general-equilibrium, overlapping-generations model where tax rates are voted without past commitments in every period and characterized as a Markov equilibrium. In the United States, the younger voting-age population in 1990 compared to 1965 accounts for the observed decline in the relative capital tax rate between those two years. A younger population raises the net return to capital, leads voters to increase their savings, and results in a preference for lower taxes on capital. Conversely, aging might increase capital taxation. (JEL E13, H24, H25, J11)


Author(s):  
Manjira Datta ◽  
Leonard J. Mirman ◽  
Olivier F. Morand ◽  
Kevin L. Reffett

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