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The optimal solution to a principal-agent problem with unknown agent ability
1. | School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Kent Street, Bentley, Perth, Western Australia 6102 |
2. | School of Mathematical Sciences, Qufu Normal University, Qufu 273165, Shandong, China |
3. | School of Management and Economics, University of Electronic Science and Technology of China, No.2006, Xiyuan Avenue, West Hi-Tech Zone, Chengdu 611731, China |
We investigate a principal-agent model featured with unknown agent ability. Under the exponential utilities, the necessary and sufficient conditions of the incentive contract are derived by utilizing the martingale and variational methods, and the solutions of the optimal contracts are obtained by using the stochastic maximum principle. The ability uncertainty reduces the principal's ability of incentive provision. It is shown that as time goes by, the information about the ability accumulates, giving the agent less space for belief manipulation, and incentive provision will become easier. Namely, as the contractual time tends to infinity (long-term), the agent ability is revealed completely, the ability uncertainty disappears, and the optimal contracts under known and unknown ability become identical.
References:
[1] |
T. Adrian and M. M. Westerfield, Disagreement and learning in a dynamic contracting model, The Review of Financial Studies, 22 (2009), 3873-3906. Google Scholar |
[2] |
D. Bergemann and U. Hege,
Venture capital financing, moral hazard, and learning, Journal of Banking and Finance, 22 (1998), 703-735.
doi: 10.1016/S0378-4266(98)00017-X. |
[3] |
J.-M. Bismut,
Conjugate convex functions in optimal stochastic control, Journal of Mathematical Analysis and Applications, 44 (1973), 384-404.
doi: 10.1016/0022-247X(73)90066-8. |
[4] |
J.-M. Bismut,
Duality methods in the control of densities, SIAM Journal on Control and Optimization, 16 (1978), 771-777.
doi: 10.1137/0316052. |
[5] |
K. Chen, X. Wang, M. Huang and W.-K. Ching,
Salesforce contract design, joint pricing and production planning with asymmetric overconfidence sales agent, Journal of Industrial and Management Optimization, 13 (2017), 873-899.
doi: 10.3934/jimo.2016051. |
[6] |
J. Cvitanić, X. Wan and J. Zhang,
Optimal compensation with hidden action and lump-sum payment in a continuous-time model, Applied Mathematics and Optimization, 59 (2009), 99-146.
doi: 10.1007/s00245-008-9050-0. |
[7] |
D. Fudenberg and L. Rayo, Training and effort dynamics in apprenticeship, American Economic Review, 109 (2019), 3780-3812. Google Scholar |
[8] |
M. Fujisaki, G. Kallianpur and H. Kunita,
Stochastic differential equations for the non linear filtering problem, Osaka Journal of Mathematics, 9 (1972), 19-40.
|
[9] |
Y. Giat, S. T. Hackman and A. Subramanian, Investment under uncertainty, heterogeneous beliefs, and agency conflicts, The Review of Financial Studies, 23 (2009), 1360-1404. Google Scholar |
[10] |
Z. He, B. Wei, J. Yu and F. Gao, Optimal long-term contracting with learning, The Review of Financial Studies, 30 (2017), 2006-2065. Google Scholar |
[11] |
B. Holmstrom and P. Milgrom,
Aggregation and linearity in the provision of intertemporal incentives, Econometrica, 55 (1987), 303-328.
doi: 10.2307/1913238. |
[12] |
H. A. Hopenhayn and A. Jarque,
Moral hazard and persistence, Ssrn Electronic Journal, 7 (2007), 1-32.
doi: 10.2139/ssrn.2186649. |
[13] |
J. Hörner and L. Samuelson, Incentives for experimenting agents, The RAND Journal of Economics, 44 (2013), 632-663. Google Scholar |
[14] |
J. Mirlees,
The optimal structure of incentives and authority within an organization, Bell Journal of Economics, 7 (1976), 105-131.
doi: 10.2307/3003192. |
[15] |
M. Mitchell and Y. Zhang,
Unemployment insurance with hidden savings, Journal of Economic Theory, 145 (2010), 2078-2107.
doi: 10.1016/j.jet.2010.03.016. |
[16] |
J. Prat and B. Jovanovic,
Dynamic contracts when the agent's quality is unknown, Theoretical Economics, 9 (2014), 865-914.
doi: 10.3982/TE1439. |
[17] |
Y. Sannikov,
A continuous-time version of the principal-agent problem, The Review of Economic Studies, 75 (2008), 957-984.
doi: 10.1111/j.1467-937X.2008.00486.x. |
[18] |
H. Schättler and J. Sung,
The first-order approach to the continuous-time principal–agent problem with exponential utility, Journal of Economic Theory, 61 (1993), 331-371.
doi: 10.1006/jeth.1993.1072. |
[19] |
K. Uğurlu,
Dynamic optimal contract under parameter uncertainty with risk-averse agent and principal, Turkish Journal of Mathematics, 42 (2018), 977-992.
doi: 10.3906/mat-1703-102. |
[20] |
C. Wang and Y. Yang,
Optimal self-enforcement and termination, Journal of Economic Dynamics and Control, 101 (2019), 161-186.
doi: 10.1016/j.jedc.2018.12.010. |
[21] |
X. Wang, Y. Lan and W. Tang,
An uncertain wage contract model for risk-averse worker under bilateral moral hazard, Journal of Industrial and Management Optimization, 13 (2017), 1815-1840.
doi: 10.3934/jimo.2017020. |
[22] |
N. Williams, On dynamic principal-agent problems in continuous time, working paper, University of Wisconsin, Madison, (2009). Google Scholar |
[23] |
N. Williams,
A solvable continuous time dynamic principal–agent model, Journal of Economic Theory, 159 (2015), 989-1015.
doi: 10.1016/j.jet.2015.07.006. |
[24] |
T.-Y. Wong, Dynamic agency and endogenous risk-taking, Management Science, 65 (2019), 4032-4048. Google Scholar |
[25] |
J. Yong and X. Y. Zhou, Stochastic controls: Hamiltonian systems and HJB equations, vol. 43, Springer Science and Business Media, 1999.
doi: 10.1007/978-1-4612-1466-3. |
show all references
References:
[1] |
T. Adrian and M. M. Westerfield, Disagreement and learning in a dynamic contracting model, The Review of Financial Studies, 22 (2009), 3873-3906. Google Scholar |
[2] |
D. Bergemann and U. Hege,
Venture capital financing, moral hazard, and learning, Journal of Banking and Finance, 22 (1998), 703-735.
doi: 10.1016/S0378-4266(98)00017-X. |
[3] |
J.-M. Bismut,
Conjugate convex functions in optimal stochastic control, Journal of Mathematical Analysis and Applications, 44 (1973), 384-404.
doi: 10.1016/0022-247X(73)90066-8. |
[4] |
J.-M. Bismut,
Duality methods in the control of densities, SIAM Journal on Control and Optimization, 16 (1978), 771-777.
doi: 10.1137/0316052. |
[5] |
K. Chen, X. Wang, M. Huang and W.-K. Ching,
Salesforce contract design, joint pricing and production planning with asymmetric overconfidence sales agent, Journal of Industrial and Management Optimization, 13 (2017), 873-899.
doi: 10.3934/jimo.2016051. |
[6] |
J. Cvitanić, X. Wan and J. Zhang,
Optimal compensation with hidden action and lump-sum payment in a continuous-time model, Applied Mathematics and Optimization, 59 (2009), 99-146.
doi: 10.1007/s00245-008-9050-0. |
[7] |
D. Fudenberg and L. Rayo, Training and effort dynamics in apprenticeship, American Economic Review, 109 (2019), 3780-3812. Google Scholar |
[8] |
M. Fujisaki, G. Kallianpur and H. Kunita,
Stochastic differential equations for the non linear filtering problem, Osaka Journal of Mathematics, 9 (1972), 19-40.
|
[9] |
Y. Giat, S. T. Hackman and A. Subramanian, Investment under uncertainty, heterogeneous beliefs, and agency conflicts, The Review of Financial Studies, 23 (2009), 1360-1404. Google Scholar |
[10] |
Z. He, B. Wei, J. Yu and F. Gao, Optimal long-term contracting with learning, The Review of Financial Studies, 30 (2017), 2006-2065. Google Scholar |
[11] |
B. Holmstrom and P. Milgrom,
Aggregation and linearity in the provision of intertemporal incentives, Econometrica, 55 (1987), 303-328.
doi: 10.2307/1913238. |
[12] |
H. A. Hopenhayn and A. Jarque,
Moral hazard and persistence, Ssrn Electronic Journal, 7 (2007), 1-32.
doi: 10.2139/ssrn.2186649. |
[13] |
J. Hörner and L. Samuelson, Incentives for experimenting agents, The RAND Journal of Economics, 44 (2013), 632-663. Google Scholar |
[14] |
J. Mirlees,
The optimal structure of incentives and authority within an organization, Bell Journal of Economics, 7 (1976), 105-131.
doi: 10.2307/3003192. |
[15] |
M. Mitchell and Y. Zhang,
Unemployment insurance with hidden savings, Journal of Economic Theory, 145 (2010), 2078-2107.
doi: 10.1016/j.jet.2010.03.016. |
[16] |
J. Prat and B. Jovanovic,
Dynamic contracts when the agent's quality is unknown, Theoretical Economics, 9 (2014), 865-914.
doi: 10.3982/TE1439. |
[17] |
Y. Sannikov,
A continuous-time version of the principal-agent problem, The Review of Economic Studies, 75 (2008), 957-984.
doi: 10.1111/j.1467-937X.2008.00486.x. |
[18] |
H. Schättler and J. Sung,
The first-order approach to the continuous-time principal–agent problem with exponential utility, Journal of Economic Theory, 61 (1993), 331-371.
doi: 10.1006/jeth.1993.1072. |
[19] |
K. Uğurlu,
Dynamic optimal contract under parameter uncertainty with risk-averse agent and principal, Turkish Journal of Mathematics, 42 (2018), 977-992.
doi: 10.3906/mat-1703-102. |
[20] |
C. Wang and Y. Yang,
Optimal self-enforcement and termination, Journal of Economic Dynamics and Control, 101 (2019), 161-186.
doi: 10.1016/j.jedc.2018.12.010. |
[21] |
X. Wang, Y. Lan and W. Tang,
An uncertain wage contract model for risk-averse worker under bilateral moral hazard, Journal of Industrial and Management Optimization, 13 (2017), 1815-1840.
doi: 10.3934/jimo.2017020. |
[22] |
N. Williams, On dynamic principal-agent problems in continuous time, working paper, University of Wisconsin, Madison, (2009). Google Scholar |
[23] |
N. Williams,
A solvable continuous time dynamic principal–agent model, Journal of Economic Theory, 159 (2015), 989-1015.
doi: 10.1016/j.jet.2015.07.006. |
[24] |
T.-Y. Wong, Dynamic agency and endogenous risk-taking, Management Science, 65 (2019), 4032-4048. Google Scholar |
[25] |
J. Yong and X. Y. Zhou, Stochastic controls: Hamiltonian systems and HJB equations, vol. 43, Springer Science and Business Media, 1999.
doi: 10.1007/978-1-4612-1466-3. |

Known ability | Unknown ability | |
Consumption | ||
Dividend |
Known ability | Unknown ability | |
Consumption | ||
Dividend |
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