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ABSTRACT In this paper, we test whether firms properly adjust for risk in their capital budgeting decisions. If managers use a single discount rate within firms, we expect that conglomerates underinvest (overinvest) in relatively safe (risky) divisions. We measure division relative risk as the difference between the division's asset beta and a firm‐wide beta. We establish a robust and significant positive relationship between division‐level investment and division relative risk. Next, we measure the value loss due to this behavior in the context of acquisitions. When the bidder's beta is lower than that of the target, announcement returns are significantly lower.
Krüger et al. (2015) studied this question.