“…Under the assumption that the surplus of an insurance company is described by a Brownian motion with drift, Asmussen and Taksar (1997) study an optimal dividend problem for an insurance company by applying the singular stochastic control theory. For other related works we refer to Asmussen et al (2000), Taksar (2000), Paulsen (2007Paulsen ( , 2008, Schmidli (2008), Wei et al (2010), Bai et al (2012), Zhang (2012), Jiang and Yang (2013), and references therein. For the case of surplus process being spectrally negative Lévy process and the case of involving transaction costs, we refer to Loeffen (2008Loeffen ( , 2009 and Hunting and Paulsen (2013) and references therein.…”