“Beyond ought-implies-can: Impersonal obligatoriness implies historical contingency.” Journal of Ethics and Social Philosophy 29, no. 1 (2024), 29-61.

“'Ought' implies 'can' but does not imply 'must': An asymmetry between becoming infeasible and becoming overridden.” The Philosophical Review 127 (2018), 487-514.

“I ought, therefore I can obey.” Philosophers' Imprint 18, no. 1 (2018), 1-36.

“Informative aboutness.” Australasian Journal of Philosophy 95 (2017), 354-364.

“New foundations for imperative logic III: A general definition of argument validity.” Synthese 193 (2016), 1703-1753.

“New foundations for imperative logic: Pure imperative inference.” Mind 120 (2011), 369-446.

“What time travelers may be able to do.” Philosophical Studies 150 (2010), 115-121.

“In defense of imperative inference.” Journal of Philosophical Logic 39 (2010), 59-71.

“Can I kill my younger self? Time travel and the retrosuicide paradox.” Pacific Philosophical Quarterly 90 (2009), 520-534.

“Against moral character evaluations: The undetectability of virtue and vice.” The Journal of Ethics 13 (2009), 213-233.

“New foundations for imperative logic I: Logical connectives, consistency, and quantifiers.” Noûs 42 (2008), 529-572.

“I ought, therefore I can.” Philosophical Studies 136 (2007), 167-216.

“Do cry over spilt milk: Possibly you can change the past.” The Monist 88 (2005), 370-387. (This paper was in the 5 finalists - among 37 submissions - in the 2004 competition for the Oxford Studies in Metaphysics Younger Scholar Prize.)

“Aristotle on the best good: Is Nicomachean Ethics 1094a18-22 fallacious?” Phronesis 50 (2005), 116-128.

“The indeterminacy paradox: Character evaluations and human psychology.” Noûs 39 (2005), 1-42.

“Have your cake and eat it too: The Old Principal Principle reconciled with the New.” Philosophy and Phenomenological Research 69 (2004), 368-382. (This paper was awarded a 2002 Young Epistemologist prize by the Rutgers Epistemology Conference.)

“Hempel’s raven paradox: A lacuna in the standard Bayesian solution.” British Journal for the Philosophy of Science 55 (2004), 545-560.

“Who’s afraid of undermining? Why the Principal Principle might not contradict Humean Supervenience.” Erkenntnis 57 (2002), 151-174.

“Imperative foundations for the metaphysics of obligations.” In Paul McNamara, Andrew J. I. Jones, & Mark A. Brown (Eds.), Agency, norms, inquiry, and artifacts: Essays in honor of Risto Hilpinen. Cham, Switzerland: Springer Nature (2022), pp. 61-79.

“Imperatives, Logic of.” In Hugh LaFollette (Ed.), International Encyclopedia of Ethics. Oxford: Blackwell (2013), Vol. 5, pp. 2575-2585.

Comments on [Greg Restall & Gillian Russell's] 'Barriers to implication'. In Charles R. Pigden (Ed.), Hume on Is and Ought. New York: Palgrave Macmillan (2010), 260-267.

Review ofThe really hard problem: Meaning in a material world, by Owen Flanagan. Notre Dame Philosophical Reviews (2008), 2008.09.13.

Review of Sentimental rules: On the natural foundations of moral judgment, by Shaun Nichols. Mind 115 (2006), 784-790.

Review of Lack of character: Personality and moral behavior, by John Doris. The Philosophical Review 113 (2004), 284-288.

“Natural deduction for first-order pure imperative logic.” Logique et Analyse 258 (2022), 167-188.

“New foundations for imperative logic IV: Natural deduction.” Journal of Applied Logics 6 (2019), 431-446.

(With K. D. Dialektakou.) “Breakfast skipping and body mass index among adolescents in Greece: Whether an association exists depends on how breakfast skipping is defined.” Journal of the American Dietetic Association 108 (2008), 1517-1525.

“Single-case probabilities and content-neutral norms: A reply to Gigerenzer.” Cognition 81 (2001), 105-111.

“Gigerenzer’s normative critique of Kahneman and Tversky.” Cognition 76 (2000), 179-193.

“Optimal slot allocation for European air traffic flow management.” Air Traffic Control Quarterly 4 (1997), 249-280.

(With D. J. Bertsimas and A. R. Odoni.) “Dynamic ground-holding policies for a network of airports.” Transportation Science 28 (1994), 275-291.

(With D. J. Bertsimas and A. R. Odoni.) “The multi-airport ground-holding problem in air traffic control.” Operations Research 42 (1994), 249-261.