Research
Research
Sole-authored | Manuscript
Presentations: 13th Annual MannheimTaxation Conference, 2026 AAA/Deloitte Foundation/J. Michael Cook Doctoral Consortium, University of Hong Kong
Summary: Patent box regimes raise firm patenting by inducing a substitution away from trade secrecy, with downstream spillovers to follow-on innovation, peer productivity, and industry competition.
Abstract:
I examine whether patent box regimes induce firms to substitute from trade secrecy toward patenting. Using staggered adoption across Europe, I document a large and immediate increase in patenting, consistent with firms bringing unpatented inventions into the public patent system. The response is stronger where firms have greater scope to switch, reflected in lower pre-adoption patenting intensity and greater industry reliance on trade secrecy, and weaker where product market entry threat is greater, consistent with proprietary costs constraining disclosure. Confidential Community Innovation Survey data provide direct evidence: trade secrecy use declines while patent use increases. Additional analyses provide little support for contemporaneous R&D expansion. The resulting disclosures attract local follow-on invention, generate productivity gains for technologically exposed firms, and reduce industry concentration. These findings identify a disclosure channel through which patent boxes reshape knowledge diffusion and product market outcomes, a margin that R&D tax credits do not directly target.
(* denotes presentation by a co-author)
Co-authored with John Gallemore (UNC) and Ed Maydew (UNC)
Under review | Manuscript
Policy article: Tax Policy Network
Presentations: 16th European Conference on Current Research in Taxation, University of Hong Kong, Penn State University*
Summary: Tax complexity shapes the efficacy of R&D tax incentives in spurring innovation. Across U.S. state R&D tax credits, tax complexity that increases administrative frictions and compliance burdens meaningfully attunates the credit’s intended innovation impact.
Abstract:
We examine whether tax complexity hinders the effectiveness tax incentives that are intended to promote innovation. While many jurisdictions offer tax incentives for innovative activities, these incentives vary widely in their complexity, which may affect the extent to which they stimulate innovation. Exploiting variation across U.S. states over four decades, we develop a novel, time-varying measure of complexity in state-level R&D tax credit policies. We find that while larger R&D tax credits are positively associated with future corporate patenting, the effect is attenuated when tax credit complexity is high. This attenuation varies cross-sectionally based on the type of tax complexity and with firm characteristics. Finally, we find that while R&D tax credits are associated with lower innovation novelty on average, tax complexity does not materially moderate this effect. Overall, our findings indicate that tax complexity hinders the effectiveness of innovation incentives, with important implications for policy design and knowledge spillovers.
Co-authored with John Gallemore (UNC), Jeff Hoopes (UNC), and Irene Tan (HBS)
Revising for resubmission to Journal of Accounting Research
Presentations: 32nd Journal of the American Taxation Association Conference, 2025 Kellogg Accounting Conference*, University of Iowa*, University of North Carolina at Chapel Hill
Summary: Firms strategically tailor their disclosures about tariff policies to align with the policy stance of strong politicians, and this political tailoring yields tangible regulatory benefits at the cost of reduced quality of disclosure to investors.
Abstract:
We examine whether public companies change their disclosures to align with the policy preferences of powerful political actors—which we refer to as “political tailoring.” Focusing on the setting of President Donald Trump’s first and second terms in office, we study the political tailoring of discussions around tariffs, an issue with both substantial policy salience and cash flow implications. Using earnings conference call transcripts, we employ a large language model to classify the extent to which tariff discussions are politically tailored. We find that firms with incentives to appease those in charge of tariff policy, such as firms who are the most exposed to tariffs, firms that engage in other forms of political catering, such as via PAC contributions and lobbying, and firms with republican CEOs engage in greater political tailoring of these disclosures. We find evidence consistent with this tailoring having payoffs: political tailoring is positively associated with the granting of tariff exemptions during the first Trump administration, but not with the awarding of government contracts. We also find that political tailoring is negatively (positively) associated with disclosure readability (verbosity), suggesting that a potential cost to political tailoring is less informative disclosures. Our findings contribute to literatures on political influence and corporate disclosure by documenting a novel form of non-financial strategic communication with potential implications for transparency and firm value.
Co-authored with Guoman She (NUS) and Le Zhao (Nankai, China)
Under Review | Manuscript
Presentations: 13th ABFER Annual Conference*, 2026 American Taxation Association Midyear Meeting, 8th New Institutional Accounting Conference*, China Europe International Business School*, Nanjing University*, Shanghai Jiao Tong University*, Tianjin University of Finance and Economics*
Summary: Government disclosure of tax compliance serves purposes beyond enforcement by reducing information frictions in cross-border trade and expanding firm exports.
Abstract:
We examine whether disclosure of firms’ tax compliance affects international trade. In 2015, China began disclosing firms receiving the top tax compliance rating, based on detailed records of tax compliance, transactional reliability, and financial record-keeping. We posit that this disclosure provides foreign buyers with an accessible, government-assessed signal of firm integrity and reporting credibility. Using transaction-level export data, we find that top-rated firms increase exports by 7.4% relatively following the disclosure, with stronger effects on new relationship formation. Consistent with reduced information frictions, effects are stronger for private firms, in markets with lower perceived reporting quality, and where alternative information channels are limited. The effects are not driven by government-conferred privileges or confounding changes in firm fundamentals. We further show that disclosure reduces relationship disruptions and improves customer operating performance. Overall, our evidence shows that tax-related administrative information can serve purposes beyond enforcement by reducing information frictions in international trade.
By Ronald B. Davies, Tobias Hahn, Dirk Schindler, and Georg Wamser
13th Annual MannheimTaxation Conference (Mannheim, Germany | September 2026)
By Weimian Ai, David Samuel, and Liandong Zhang
16th European Conference on Current Research in Taxation (Amsterdam, the Netherlands | June 2026)
By Andrew Belnap and Till Muenster
118th NTA Annual Conference on Taxation (Boston, USA | November 2025)
By Dan Lynch and Stefanie Pendl
118th NTA Annual Conference on Taxation (Boston, USA | November 2025)