Anat Bracha

Affective Decision-Making: A Theory of Optimism-Bias

Optimism bias is inconsistent with the independence of decision weights and payoffs found in models of choice under risk and uncertainty, such as expected utility theory, subjective expected utility, and prospect theory. We therefore propose an alternative model of risky and uncertain choice where decision weights—affective or perceived risk—are endogenous.

Seeds to Succeed: Sequential Giving to Public Projects

The public phase of a capital campaign is typically launched with the announcement of a large seed donation. Andreoni (1998) argues that such a fundraising strategy may be particularly effective when funds are being raised for projects that have fixed production costs. The reason is that the introduction of fixed costs may give rise to both positive and zero provision outcomes, and absent announcements of a large seed gift, donors may get stuck in an equilibrium that fails to provide a desirable public project. Interestingly, Andreoni (1998) demonstrates that announcing seed money can help eliminate such inferior outcomes. We investigate this model experimentally to determine whether announcements of seed money eliminate the inefficiencies that may result under fixed costs and simultaneous provision. To assess the strength of the theory we examine the effect of announcements in both the presence and absence of fixed costs. Our findings are supportive of the theory for projects with sufficiently high fixed costs.

Competitive Incentives: Working Harder or Working Smarter?

Almost all jobs require a combination of cognitive effort and labor effort. This paper focuses on the effect that competitive incentive schemes have on the chosen combination of these two types of efforts. We use an experimental approach to show that competitive incentives may induce agents to work harder but not necessarily smarter. This effect was stronger for women. This paper was accepted by John List, behavioral economics.

A Psychological Perspective of Financial Panic

In spite of large number of financial crises, often depicted as episodes of financial panic, the notion of panic in financial markets is not very well understood. Many have argued that in order to understand financial crises, and in particular panic events, we need to go beyond classic economic arguments. This paper is an effort in that direction, in which we attempt to give a psychological account of panic and of panic in financial markets in particular, by discussing uncertainty, the desire for predictability and control, the illusion of control, and confidence. We suggest how one might incorporate these psychological insights into existing economic models.

Affirmative Action and Stereotype Threat

This paper experimentally investigates the effect of gender-based affirmative action (AA) on performance in the lab, focusing on a tournament environment. The tournament is based on GRE math questions commonly used in graduate school admission, and at which women are known to perform worse on average than men. We find heterogeneous effect of AA on female participants: AA lowers the performance of high-ability women and increases the performance of low-ability women. Our results are consistent with two possible mechanisms—one is that AA changes incentives differentially for low- and high-ability women, and the second is that AA triggers stereotype threat. An earlier version of this paper was circulated as “Affirmative Action and Stereotype Threat.�?

Keynesian Utilities: Bulls and Bears

We propose Keynesian utilities as a new class of non-expected utility functions representing the preferences of investors for optimism, defined as the composition of the investors preferences for risk and her preferences for ambiguity. The optimism or pessimism of Keynesian utilities is determined by empirical proxies for risk and ambiguity. Bulls and bears are defined respectively as optimistic and pessimistic investors. The resulting family of Afriat inequalities are necessary and sufficient for rationalizing the asset demands of bulls and bears with Keynesian utilities.

Public and Private Values

This paper experimentally examines whether looking at other peoples pricing decisions is a type of heuristic - a decisionmaking rule - that people use even when it is not applicable, as in the case of clearly private value goods. We find evidence that this is indeed the case - an individuals valuation of a purely subjective experience under full information, elicited using an incentive compatible mechanism, is highly influence by valuations made by others. This result can shed light on price behavior, price rigidities, and rents.