Jesper N. Wulff

Models for proportions and fractional outcomes, log-transformed and exponential models, and binary, two-part, and multinomial models.

• Binary Regression Models: An Average Partial Effects Approach
  Jesper N. Wulff. The SAGE Handbook of Quantitative Research Methods in Business & Management (SAGE Publications). R&R
  Abstract
• Exploring the Relevance of Two-Part Models in Innovation Research: Towards a Better Understanding of Innovation Sales
  Camille Pedersen, Jesper N. Wulff & Anders R. Villadsen. International Journal of Innovation Management, 29(1), 1-44, 2025.
  Abstract Article Code
• Are You 110% Sure? Modeling of Fractions and Proportions in Strategy and Management Research
  Best Paper, Research Methods Division, Academy of Management 2018
  Anders R. Villadsen & Jesper N. Wulff. Strategic Organization, 19(2), 312-337, 2021.
  Abstract Article
• Statistical Myths About Log-Transformed Dependent Variables and How to Better Estimate Exponential Models
  Anders R. Villadsen & Jesper N. Wulff. British Journal of Management, 32(3), 779-796, 2021.
  Abstract Article
• Keeping It Within Bounds: Regression Analysis of Proportions in International Business
  Jesper N. Wulff & Anders R. Villadsen. Journal of International Business Studies, 51(2), 244-262, 2020.
  Abstract Article
• Interpreting Results From the Multinomial Logit Model: Demonstrated by Foreign Market Entry
  Jesper N. Wulff. Organizational Research Methods, 18(2), 300-325, 2015.
  Abstract Article
• Generalized Two-Part Fractional Regression With cmp
  Jesper N. Wulff. The Stata Journal, 19(2), 375-389, 2019.
  Abstract Article

Sample-size-dependent significance thresholds and the sound use of null hypothesis significance testing.

• How and Why Alpha Should Depend on Sample Size: A Bayesian-Frequentist Compromise for Significance Testing
  SAGE/RMD Best Paper Award Nominee, Academy of Management 2023
  Jesper N. Wulff & L. N. Taylor. Strategic Organization, 22(3), 550-581, 2024.
  Abstract Article Preprint Code Web app
• Blaming the Thermometer for the Fever: Separating Misapplication from Method in Null Hypothesis Significance Testing
  SAGE/RMD Best Division Conference Paper Award, Academy of Management 2025
  Lau Abild Holgersen, Daniel Lakens & Jesper N. Wulff. British Journal of Management. Under review
  Abstract Preprint

How robust published estimates are to omitted confounding — and how to run and report sensitivity analysis correctly.

• Hic Sunt Dracones: On the Risks of Comparing the ITCV With Control Variable Correlations
  Sirio Lonati & Jesper N. Wulff. Journal of Management, 52(2), 801-827, 2026.
  Abstract Article Code
• Why You Should Not Use the ITCV With Robust Standard Errors (and What to Do Instead)
  Best Paper, Research Methods Division, Academy of Management 2026
  Sirio Lonati & Jesper N. Wulff. Organizational Research Methods. Under review
  Abstract Preprint
• Diagnostics Without Microdata: Assessing Credibility of Event Studies and Difference-in-Differences Estimates After Publication
  Phillip Heiler & Jesper N. Wulff. Journal of Business & Economic Statistics. Working paper

Replication, analytical robustness, and common methodological mistakes in the social and behavioural sciences.

• Investigating the Analytical Robustness of the Social and Behavioural Sciences
  Balazs Aczel, Barnabas Szaszi, Jesper N. Wulff, Brian Nosek, et al.. Nature, 652, 135-142, 2026.
  Abstract Article Preprint
• Investigating the Replicability of the Social and Behavioral Sciences
  Adam H. Tyner, Jesper N. Wulff, Brian Nosek, Timothy M. Errington, et al.. Nature, 652, 143-150, 2026.
  Abstract Article Preprint
• Common Methodological Mistakes
  Jesper N. Wulff, Gwendolin B. Sajons, Ganna Pogrebna, Sirio Lonati, George C. Banks, Nicolas Bastardoz & John Antonakis. The Leadership Quarterly, 34(1), 101677, 2023.
  Abstract Article
• Are Survey Experiments as Valid as Field Experiments in Management Research? An Empirical Comparison Using the Case of Ethnic Employment Discrimination
  Top Cited Article 2020–2021, European Management Review
  Jesper N. Wulff & Anders R. Villadsen. European Management Review, 17(1), 347-356, 2020.
  Abstract Article

Practical guidance and methods for handling missing data, from chained equations to multilevel imputation.

• Multiple Imputation by Chained Equations in Praxis: Guidelines and Review
  Jesper N. Wulff & Linda Ejlskov. Electronic Journal of Business Research Methods, 15(1), 41-56, 2017.
  Abstract Full text
• A Bi-Objective k-Nearest-Neighbors-Based Imputation Method for Multilevel Data
  Maximiliano Cubillos, Sanne Wøhlk & Jesper N. Wulff. Expert Systems with Applications, 204, 117298, 2022.
  Abstract Article Code

Computer vision and transformer models applied to finance and business processes.

• From Pixels to Signals: Hierarchical Vision Transformers for Return Prediction
  Jonas Theill Bøjstrup, Bezirgen Veliyev & Jesper N. Wulff. Journal of Financial Econometrics. Under review
  Abstract Preprint
• Pioneering Automation in Agricultural Subsidy Processing Through Deep Learning for Computer Vision
  K. T. D. Braun & Jesper N. Wulff. Journal of Business Analytics, 8(2), 93-115, 2025.
  Abstract Article

CEO personality and behaviour, acquisitions, and firm dynamics.

• CEO Personality Traits, Strategic Flexibility, and Firm Dynamics
  Tom Aabo, Christos Pantzalis, J. C. Park, Lenos Trigeorgis & Jesper N. Wulff. Journal of Corporate Finance, 84(1), 102524, 2024.
  Abstract Article Preprint
• Watch Me Go Big: CEO Narcissism and Corporate Acquisitions
  Tom Aabo, M. Als, L. Thomsen & Jesper N. Wulff. Review of Behavioral Finance, 13(5), 465-485, 2021.
  Abstract Article Preprint
• European Cross-Border Acquisitions: Long-Run Stock Returns and Firm Characteristics
  M. Jensen-Vinstrup, Damiano Rigamonti & Jesper N. Wulff. Journal of Multinational Financial Management, 47-48, 31-45, 2018.
  Abstract Article

Discrimination, leadership, values, and performance in public organizations.

• Comparing Apples With Apples: The Performance of State and Privately Owned Chinese Football Clubs
  Jacob Arnoldi, Anders R. Villadsen & Jesper N. Wulff. Asian Business & Management. In press
  Abstract Article
• Public and Private Differences in Employees' Values: A Cross-Country Investigation of Schwartz's Basic Human Values Theory
  M. Frost, Jesper Rosenberg Hansen & Jesper N. Wulff. International Public Management Journal, 26(6), 807-828, 2023.
  Abstract Article
• Does Good Performance Reduce Bad Behavior? Antecedents of Ethnic Employment Discrimination in Public Organizations
  Best Paper, PNP Division & Carlo Masini Award for Innovative Scholarship, Academy of Management 2018
  Thorbjørn Sejr Guul, Anders R. Villadsen & Jesper N. Wulff. Public Administration Review, 79(5), 666-674, 2019.
  Abstract Article
• A Two-Pronged Approach? Combined Leadership Styles and Innovative Behavior
  Franziska Günzel-Jensen, Jesper Rosenberg Hansen, Mads L. F. Jakobsen & Jesper N. Wulff. International Journal of Public Administration, 41(12), 957-970, 2018.
  Abstract Article
• Is the Public Sector a Fairer Employer? Ethnic Employment Discrimination in the Public and Private Sectors
  Academy of Management Award for Responsible Research in Management, 2022
  Anders R. Villadsen & Jesper N. Wulff. Academy of Management Discoveries, 4(4), 429-448, 2018.
  Abstract Article Video abstract

Register-based studies of socioeconomic position, mental health, and disease risk.

• Multilevel Survival Analysis of Interactions Between Parental- and Neighbourhood-Level Socioeconomic Indices in Childhood and Later Risks of Self-Harm and Violent Criminality: A National Cohort Study
  Linda Ejlskov, Sussie Antonsen, Jesper N. Wulff, Oleguer Plana-Ripoll, Clive Sabel, Carsten B. Pedersen, Roger T. Webb, et al.. The Lancet Public Health, 8(2), 99-108, 2023.
  Abstract Article
• Prediction of Autism Risk From Family Medical History Data Using Machine Learning: A National Cohort Study From Denmark
  Linda Ejlskov, Jesper N. Wulff, Amy Kalkbrenner, Christine Ladd-Acosta, M. Daniele Fallin, Esben Agerbo, Preben Bo Mortensen, Brian K. Lee, Diana Schendel, et al.. Biological Psychiatry Global Open Science, 1(2), 156-164, 2021.
  Abstract Article
• The Effect of Early-Life and Adult Socioeconomic Position on Development of Lifestyle-Related Diseases
  Linda Ejlskov, Henrik Bøggild, Claus D. Hansen, Jesper N. Wulff, Theis Lange, Thomas Gerds, Christian Torp-Pedersen, et al.. European Journal of Public Health, 29(3), 562-567, 2019.
  Abstract Article
• Assessing the Relative Importance of Correlates of Loneliness in Later Life: Gaining Insight Using Recursive Partitioning
  Linda Ejlskov, Jesper N. Wulff, Henrik Bøggild, Diana Kuh & Mai Stafford. Aging & Mental Health, 22(11), 1486-1493, 2018.
  Abstract Article