This paper continues the investigation of minimax regret treatment choice initiated by Manski (2004). Consider a decision maker who must assign treatment to future subjects after observing outcomes experienced in a finite sample. A certain scoring rule is known to achieve minimax regret in numerous variants of this decision problem. I investigate the sensitivity of these findings to perturbatio...

Recently, there has been a growing research interest in the analysis of dynamic regret, which measures the performance of an online learner against a sequence of local minimizers. By exploiting the strong convexity, previous studies have shown that the dynamic regret can be upper bounded by the path-length of the comparator sequence. In this paper, we illustrate that the dynamic regret can be f...

In a stock market experiment, we examine how regret avoidance influences the decision to sell an asset while its price changes over time. Participants know beforehand whether they will observe future prices after or not. Without prices, participants are affected only by about previously observed high (past regret), but when available, also avoid expected after-sale (future regret). Moreover, as...

The article considers three theses about postabortion regret which seek to illustrate its pertinence to reasoning about abortion, and which are often deployed, either explicitly or implicitly, to dissuade women out of that reproductive choice. The first is that postabortion regret renders an abortion morally unjustified. The second is that that a relatively high incidence of postabortion regret...

When a …rm introduces a product with new features, some consumers may …nd it di¢ cult to assess their valuations for these new attributes. Their purchase decisions made under such uncertainty may lead to post-purchase regret. It has been experimentally shown that consumers anticipate their potential post-purchase regret in the future and make their current choices to mitigate or minimize it. Th...

Decisions are powerfully affected by anticipated regret, and people anticipate feeling more regret when they lose by a narrow margin than when they lose by a wide margin. But research suggests that people are remarkably good at avoiding self-blame, and hence they may be better at avoiding regret than they realize. Four studies measured people's anticipations and experiences of regret and self-b...

In this study we explored the prevalence of regret following uncommitted sexual encounters (i.e., casual sex that occurs with someone once and only once or with someone known for less than 24 hours) among 138 female and 62 male Canadian university students, who were approximately 21 years of age. The majority of participants self-reported that they had experienced feelings of regret after an un...

This paper provides an axiomatic model of decision making under uncertainty in which the decision maker is driven by anticipated ex-post regrets. Our model allows both regret aversion and likelihood judgement over states to coexist. Also, we characterize two special cases, minimax regret with multiple priors that generalizes Savage’s minimax regret, and a smooth model of regret aversion.

For convex games, connections between playing by no-regret algorithms and playing equilibrium strategies have previously been made for Φregret, a generalization of external regret [5]. In particular, Gordon et al. present a no-Φ-regret algorithm for several different classes of transformations Φ [4]. In this paper, we instantiate the algorithm for the class of linear transformations using a var...

INTRODUCTION Nearly all smokers in high-income Western countries report that they regret smoking (Fong, G. T., Hammond, D., Laux, F. L., Zanna, M. P., Cummings, M. K., Borland, R., & Ross, H. [2004]. The near-universal experience of regret among smokers in four countries: Findings from the International Tobacco Control Policy Evaluation Survey. Nicotine and Tobacco Research, 6, S341-S351. doi:1...