Managing the risks posed by nonindigenous species can benefit from a consistent framework for bioeconomic risk assessment. Endogenous risk provides one framework that works to integrate the biological and economic circumstances. In this study, we explore how changes in manager's preferences for time (i.e., discounting) and for bearing risk affect the choice of optimal prevention and control in invasive species management. The results suggest invasive species managers who behave in a less myopic and less risk averse fashion are likely to invest more in prevention and less in control, which in turn requires less private adaptation, resulting in greater social welfare relative to more myopic and risk averse behavior.