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Business & Management | Optimal Consumption and Investment with Bankruptcy

Optimal Consumption and Investment with Bankruptcy

Sethi, Suresh P.

1997, XX, 428 p.

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This book presents papers on continuous-time consumption­ investment models by Suresh Sethi and various co-authors. Sir Isaac Newton said that he saw so far because he stood on the shoulders of gi­ ants. Giants upon whose shoulders Professor Sethi and colleagues stand are Robert Merton, particularly Merton's (1969, 1971, 1973) seminal papers, and Paul Samuelson, particularly Samuelson (1969). Karatzas, Lehoczky, Sethi and Shreve (1986), henceforth KLSS, re­ produced here as Chapter 2, reexamine the model proposed by Mer­ ton. KLSS use methods of modern mathematical analysis, taking care to prove the existence of integrals, check the existence and (where appro­ priate) the uniqueness of solutions to equations, etc. KLSS find that un­ der some conditions Merton's solution is correct; under others, it is not. In particular, Merton's solution for aHARA utility-of-consumption is correct for some parameter values and not for others. The problem with Merton's solution is that it sometimes violates the constraints against negative wealth and negative consumption stated in Merton (1969) and presumably applicable in Merton (1971 and 1973). This not only affects the solution at the zero-wealth, zero-consumption boundaries, but else­ where as well. Problems with Merton's solution are analyzed in Sethi and Taksar (1992), reproduced here as Chapter 3.

Content Level » Research

Related subjects » Business & Management - Finance & Banking - Operations Research & Decision Theory

Table of contents 

Foreword; Harry M. Markowitz. Preface. Part I: Introduction. 1. Consumption/Investment Problems. Part II: Models with Constant Market Parameters and Nonnegative Consumption. 2. Explicit Solution of a General Consumption/Investment Problem. 3. A Note on Merton's `Optimum Consumption and Portfolio Rules in a Continuous-Time Model'. 4. Infinite-Horizon Investment Consumption Model with a Nonterminal Bankruptcy. 5. Risk-Aversion Behavior in Consumption/Investment Problems. Part III: Models with Constant Market Parameters and Positive Subsistence Consumption. 6. Explicit Solution of a General Consumption/Portfolio Problem with Subsistence Consumption and Bankruptcy. 7. Distribution of Bankruptcy Time in a Consumption/Portfolio Problem. 8. Risk-Aversion Behavior in Consumption/Investment Problems with Subsistence Consumption. 9. Consumption Behavior in Investment/Consumption Problems. 10. Equivalence of Objective Functionals in Infinite Horizon and Random Horizon Problems. 11. A Contribution to the Micro Foundation for Keynesian Macroeconomic Models. Part IV: Models with More General Markets and Positive Subsistence Consumption. 12. The Consumption-Investment Problem with Subsistence Consumption, Bankruptcy, and Random Market Coefficients. Part V: Models with Constant Market Parameters, Positive Subsistence Consumption and Borrowing/Shortselling Constraints. 13. Optimal Dynamic Consumption and Portfolio Planning in a Welfare State. 14. Optimal Consumption and Investment Policies Allowing Consumption Constraints, Bankruptcy and Welfare. 15. A Martingale Formulation for Optimal Consumption/Investment Decision Making. Part VI: Conclusions. 16. Concluding Remarks and Open Research Problems. Author Index. Copyright Permissions.

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