Ortmann, R., &; Pummerer, E. (2023). Distortional effects of separate accounting and formula apportionment on factor allocation. Journal of Business Economics.https://doi.org/10.1007/s11573-022-01133-5 
LibreCat: /record/41192
DOI: 10.1007/s11573-022-01133-5

Ortmann, R., &; Schindler, D. (2022). Income Shifting and Management Incentives.
LibreCat: /record/41182

Warkulat, S., Krull, S., Ortmann, R., Klocke, N., &; Pelster, M. (2021). COVID-19 reporting and willingness to pay for leisure activities. Covid Economics, 83, 183–205.
LibreCat: /record/22523

Ortmann, R., Warkulat, S., Krull, S., Klocke, N., &; Pelster, M. (2021). COVID-19 Reporting and Willingness to Pay for Leisure Activities (Vol. 83).
LibreCat: /record/41197

Ortmann, R., Simons, D., &; Voeller, D. (2021). Real effects of an international tax reform for MNEs (Vol. 64).
LibreCat: /record/41184

Ortmann, R., Pelster, M., &; Wengerek, S. T. (2020). COVID-19 and investor behavior. Finance Research Letters, 37.https://doi.org/10.1016/j.frl.2020.101717 
LibreCat: /record/17730
DOI: 10.1016/j.frl.2020.101717

Ortmann, R., Pelster, M., &; Wengerek, S. T. (2020). COVID-19 and investor behavior. Finance Research Letters, 37, Article 101717.https://doi.org/10.1016/j.frl.2020.101717 
LibreCat: /record/41180
DOI: 10.1016/j.frl.2020.101717

Ortmann, R., &; Sureth-Sloane, C. (2016). Can the CCCTB Alleviate Tax Discrimination against Loss-Making European Multinational Groups? Journal of Business Economics, 86(5), 441–475.https://doi.org/10.1007/s11573-015-0780-6 
LibreCat: /record/4739
DOI: 10.1007/s11573-015-0780-6

Ortmann, R., &; Sureth-Sloane, C. (2016). Can the CCCTB Alleviate Tax Discrimination against Loss-Making European Multinational Groups? Journal of Business Economics, 86(5), 441–475.https://doi.org/10.1007/s1007-015-0780-6 
LibreCat: /record/4744
DOI: 10.1007/s1007-015-0780-6

Ortmann, R. (2015). Uncertainty in Weighting Formulary Apportionment Factors. How Does Weighting Uncertainty Impact After-Tax Income of Multinational Groups?, (Vol. 2015–10).
LibreCat: /record/4745

Ortmann, R. (2015). Uncertainty in Weighting Formulary Apportionment Factors and Its Impact on After-Tax Income of Multinational Groups (Vol. 198).
LibreCat: /record/14913

Ortmann, R. (2015). Uncertainty in Weighting Formulary Apportionment Factors. Die Betriebswirtschaft, 75(3), 161–177.
LibreCat: /record/4747

Ortmann, R., &; Sureth-Sloane, C. (2014). Can the CCCTB Alleviate Tax Discrimination against Loss-Making European Multinational Groups? (Vol. 165).
LibreCat: /record/4750