Diploma thesis deals with the estimation of Laffer Curve including quantification of a point where corporate tax rate provides maximal revenue. Parabolic relationship is examined between statutory and effective average tax rate and tax revenues relative to GDP. The estimation is performed on empirical data of the Czech Republic and the Federal Republic of Germany. Methods of regression analysis, especially the method of Ordinary Least Squares and its generalized version, are used. Further the effect of selected factors (tax evasion, size of economy, openness of economy, etc.) on corporate tax revenues and on corporate tax rates is verified across 28 European Union members using the methods of nonparametric correlation analysis. Similarly, the effect of corporate taxation on selected macroeconomic indicators (e.g. economic growth, investment) is examined.