We examine Korean chaebols to determine the costs and benefits associated with the operation of a diversified business group. We find that chaebol-affiliated firms suffer a value loss relative to non-affiliated firms. We observe that this value loss holds even after controlling for the relatedness of the diversification present within the chaebol. To identify the causes of this value loss, we obtain evidence suggesting that chaebol firms: (1) pursue profit stability rather than profit maximization, (2) over-invest in low performing industries, and (3) cross-subsidize the weaker members of their group. We do find however that chaebol firms possess greater debt capacity and consequently enjoy lower tax burdens. Nevertheless, because chaebols suffer an overall loss in value, we conclude that the costs associated with chaebol membership exceed its benefits.