Stochastic Control Problems where Small Intervention Costs Have Big Effects
Stochastic Control Problems where Small Intervention Costs Have Big Effects
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小干预成本产生大影响的随机控制问题
DOI:
10.1007/s002459900130
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发表时间:
1999
影响因子:
1.8
通讯作者:
B. Øksendal
中科院分区:
文献类型:
--
作者:
B. Øksendal
Abstract. We study an impulse control problem where the cost of interfering in a stochastic system with an impulse of size ζ∈R is given by c+λ|ζ|, where c and λ are positive constants. We call λ the proportional cost coefficient and c the intervention cost . We find the value/cost function Vc for this problem for each c>0 and we show that limc→ 0+Vc=W , where W is the value function for the corresponding singular stochastic control problem. Our main result is that
$$ \frac{dV_c}{dc}=\infty \ at \ c=0. $$
This illustrates that the introduction of an intervention cost c>0 , however small, into a system can have a big effect on the value function: the increase in the value function is in no proportion to the increase in c (from c=0 ).