Unemployment, Politics, and the Enforcement of Immigration Law
Public Choice, 2014, vol. 160, issue 1, pages 131-153 (with Thomas Stratmann)

The Determinants of Federal and State Enforcement of Workplace Safety Regulations: OSHA Inspections 1993-2010
Journal of Regulatory Economics, (2014), Volume 45, Issue 1, Pages 1- 33 (lead article) (with Juergen Jung)

Political Costs and Fiscal Benefits: The Political Economy of Residential Property Value Assessment under Proposition 2 1/2
Economics Letters, (2013), Volume 120,  Issue 3, pages 359-363 (lead article) (with Shane Sanders)

More Tickets, Fewer Accidents: How Cash-Strapped Towns make for Safer Roads
Journal of Law and Economics, (2011), Volume 54, Issue 4, pages 863-888 (with Thomas Stratmann) 

Determinants of Traffic Citations: Political Economy at Any Speed
American Economic Review, (2009), Volume 99, No.  1  (with Thomas Stratmann) 

Work in Progress

To Serve and Collect: The Fiscal and Racial Determinants of Law Enforcement
(with Thomas Stratmann and Alex Tabarrok)

Roadway Fatalities and Law Enforcement: A joint effort with the Saskatchewan Royal Canadian Mounted Police
(with Gregory DeAngelo and Rick Ruddell)

Rule Enforcement and The Price of Hypocrisy
(with Gregory DeAngelo and Bryan McCannon)

Embezzlement, Whistleblowing, and Organizational Structure
(with Siyu Wang)