Guenther, DavidWu, Kaishu2018-09-062018-09-062018-09-06https://hdl.handle.net/1794/23753I hypothesize and find that the variation in corporate tax avoidance is jointly determined by firms’ incentive and opportunities to avoid taxes. Specifically, the positive relation between financial constraints (my proxy for an incentive to avoid taxes) and tax avoidance is significantly stronger for firms with high tax planning opportunities (TPO), where TPO is the distance between a firm’s actual and predicted ETRs. I further show that firms with TPOs based on high permanent (temporary) book-tax differences exhibit more permanent (temporary) book-tax differences under financial constraints. From a risk perspective, I find no evidence that financially constrained firms with low TPO exhibit more tax risk but some evidence that those with high TPO do so. In general, the findings in this paper provide evidence consistent with an incentive-opportunity interaction story to help explain differences in corporate tax avoidance.en-USAll Rights Reserved.Financial constraintIncentivesOpportunityRiskTax avoidanceElectronic Thesis or Dissertation