02633nmm a2200373 u 4500001001200000003002700012005001700039007002400056008004100080020001800121020001800139020001500157100002300172245012100195260006200316300001000378651001400388653002200402653001500424653004400439653001600483653002300499653000900522700002700531700002300558700002100581041001900602989003700621490003800658028003000696856012200726082000800848520140300856EB000931174EBX0100000000000000072477000000000000000.0cr|||||||||||||||||||||150128 ||| eng z9781451982770 a9781451982770 a14519827711 aMartinez, Leonardo00aQuantitative properties of sovereign default modelshelectronic resourcebsolution methods mattercLeonardo Martinez aWashington, D.C.bInternational Monetary Fundc2010, 2010 a28 p. 4aArgentina aNumerical Methods aBond Price aInternational Lending and Debt Problems aComputation aEmerging Economies aBond1 aHatchondo, Juan Carlos1 aMartinez, Leonardo1 aSapriza, Horacio07aeng2ISO 639-2 bIMFaInternational Monetary Fund0 aIMF Working Papers; Working Paper50a10.5089/9781451982770.001 uhttp://elibrary.imf.org/view/IMF001/10875-9781451982770/10875-9781451982770/10875-9781451982770.xmlxVerlag3Volltext0 a330 aWe study the sovereign default model that has been used to account for the cyclical behavior of interest rates in emerging market economies. This model is often solved using the discrete state space technique with evenly spaced grid points. We show that this method necessitates a large number of grid points to avoid generating spurious interest rate movements. This makes the discrete state technique significantly more inefficient than using Chebyshev polynomials or cubic spline interpolation to approximate the value functions. We show that the inefficiency of the discrete state space technique is more severe for parameterizations that feature a high sensitivity of the bond price to the borrowing level for the borrowing levels that are observed more frequently in the simulations. In addition, we find that the efficiency of the discrete state space technique can be greatly improved by (i) finding the equilibrium as the limit of the equilibrium of the finite-horizon version of the model, instead of iterating separately on the value and bond price functions and (ii) concentrating grid points in asset levels at which the bond price is more sensitive to the borrowing level and in levels that are observed more often in the model simulations. Our analysis questions the robustness of results in the sovereign default literature and is also relevant for the study of other credit markets