Optimal Timing of Information Security Investment: A Real Options Approach
- Ken-ichi Tatsumi, Gakushuin University
- Makoto GOTO, Waseda University
- This paper applies real options analytic framework to firmsí investment activity in information security technology and then a dynamic analysis of information security investment is explored by extending Gordon-Loeb (2002). The current research provides how firms have to respond to immediate or remote threat numerically. It shows that although positive drift of threat causes both larger and immediate investment expenditure, negative drift causes later investment and lower investment expenditure. The efficiency of vulnerability reduction technology encourages firms to invest earlier and induces cost reduction. To know the form of vulnerability is important because the effect of high vulnerability on timing and amount of the investment expenditure is mixed.
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