This doctoral thesis presents five empirical essays on the impact of corporate taxes on companies’ decisions. All of its five papers are based on detailed and comprehensive micro datasets covering firm information of multinational companies. The five essays of this doctoral thesis analyze the tax impact on three of the most important decisions of corporations: the decision of how much to invest, the decision of how to finance such investments, and the decision of what group structures to embed the investments in. Three essays deal with the impact of taxes on investment and one essay each focuses on financing and on tax-induced group structuring. All five papers deal with corporate taxes. Three of them solely focus on the impact of profit taxes on corporations’ decisions, while the last two of them also take source taxes into account. Each of the five papers contains descriptive statistics and derives the tax hypotheses in detail. The five essays are titled as follows: \ud
1. The Impact of Corporate Taxes on Investment\ud
2. Investment Impact of Tax Loss Treatment\ud
3. Empirical Evaluation of Interest Barrier Effects \ud
4. The Impact of Tax Treaties and Repatriation Taxes on FDI Revisited \ud
5. Form Follows Function? - Evidence on tax savings by multinational holding structure