Ivonne A. Liebenberg

What Effect Did Aig's Bailout, and the Preceding Events, Have on its Competitors?

We examine the effect of AIG’s bailout, and the events leading up to it, on its insurance industry rivals. The reaction of rivals to AIG-related events depends on the relative strength of two competing effects. The contagion effect implies that rival returns will decrease following negative events affecting AIG. In contrast, competitive effects will occur if investors expect that rivals will be able to benefit from AIG’s downfall. Using a three-factor multivariate regression model event study methodology we find evidence of both effects around several key dates in AIG’s decline.

Insurer Growth Strategies: Insurer Growth Strategies

We study corporate growth strategy within the U.S. property–casualty insurance industry—where firms are required to report uniquely detailed operating information. We present and test two hypotheses related to the manner in which firms choose to grow: the pecking order hypothesis and the managerial discretion hypothesis. Our results imply that insurers follow a general pecking order of growth strategies, where they tend to grow first by entering new states, then by adding new lines of business, and finally through acquisitions. This order is consistent with firms initially choosing to grow in the least costly and complex manner and subsequently choosing more costly and complex methods. We also find evidence in support of the managerial discretion hypothesis as mutual insurers are less likely to choose to grow and, when they do, they tend to select less complex growth methods.

Decomposing diversification effect: evidence from the U.S. property-liability insurance industry

Prior literature suggests that diversified property-liability (P/L) insurers underperform their focused counterparts. While most studies focus on insurers’ overall performance, there is an absence of evidence regarding whether the underperformance is driven by underwriting or investment profitability. The authors develop and test hypotheses of diversification’s separate effect on underwriting and investing in the U.S. property-liability (P/L) insurance industry. It is found that diversified insurers outperform their focused counterparts in terms of investment return, but that they underperform in terms of underwriting profitability. The results are robust to corrections for endogeneity bias and a matched sample analysis.