Discussion Paper No. 173
November 8, 2021
Boolean Representations of Preferences under Ambiguity
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We propose a class of multiple-prior representations of preferences under ambiguity where the belief the decision-maker (DM) uses to evaluate an uncertain prospect is the outcome of a game played by two conflicting forces, Pessimism and Optimism. The model does not restrict the sign of the DM's ambiguity attitude, and we show that it provides a unified framework through which to characterize different degrees of ambiguity aversion, as well as to represent context-dependent negative and positive ambiguity attitudes documented in experiments. We prove that our baseline representation, Boolean expected utility (BEU), yields a novel representation of the class of invariant biseparable preferences (Ghirardato, Maccheroni and Marinacci, 2004), which drops uncertainty aversion from maxmin expected utility (Gilboa and Schmeidler, 1989), while extensions of BEU allow for more general departures from independence.
Keywords:
multiple priors; ambiguity; dual-self models;
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Discussion Paper No. 172
The Rise of Fiscal Capacity
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Having sufficient fiscal capacity to tax is a key hallmark and defining feature of states, and there is a growing literature trying to explain its origins. Existing empirical evidence on fiscal capacity is scarce and focuses on large, ex-post successful territories. In this paper we study the introduction of the first centralized, permanent fiscal institutions in the multifarious territories of the Holy Roman Empire from 1400 to 1800. We link information on fiscal centralization and the size and survival of territories to an extensive dataset on state-formation and growth-related outcomes. We empirically confirm that territories are more likely to centralize when neighboring territories are centralized and when they are exposed to a higher threat of war. In line with the literature on the consequences of fiscal capacity, we show that centralized territories are more likely to survive than non-centralized territories and as a result grow more in size. They invest more in administrative and military structures, but investments in the military only occur in the core areas of centralized territories. This contradicts the central assumption of models on fiscal capacity which states that investments into the military are a non-excludable public good.
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Discussion Paper No. 171
The Standard Portfolio Choice Problem in Germany
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We study an investment experiment with a representative sample of German households. Respondents invest in a safe asset and a risky asset whose return is tied to the German stock market. Experimental investments correlate with beliefs about stock market returns and exhibit desirable external validity at least in one respect: they predict real-life stock market participation. But many households are unresponsive to an exogenous increase in the risky asset's return. The data analysis and a series of additional laboratory experiments suggest that task complexity decreases the responsiveness to incentives. Modifying the safe asset's return has a larger effect on behaviour than modifying the risky asset's return.
Keywords:
stock market expectations; stock market participation; portfolio choice; financial literacy; complexity;
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Discussion Paper No. 170
Belief Updating: Does the 'Good-News, Bad-News' Asymmetry Extend to Purely Financial Domains?
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Bayes' statistical rule remains the status quo for modeling belief updating in both normative and descriptive models of behavior under uncertainty. Some recent research has questioned the use of Bayes' rule in descriptive models of behavior, presenting evidence that people overweight 'good news' relative to 'bad news' when updating ego-relevant beliefs. In this paper, we present experimental evidence testing whether this 'good-news, bad-news' effect is present in a financial decision making context (i.e. a domain that is important for understanding much economic decision making). We find no evidence of asymmetric updating in this domain. In contrast, in our experiment, belief updating is close to the Bayesian benchmark on average. However, we show that this average behavior masks substantial heterogeneity in individual updating. We find no evidence in support of a sizeable subgroup of asymmetric updators.
Keywords:
economic experiments; bayes' rule; belief updating; belief measurement; proper scoring rules; motivated beliefs;
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Discussion Paper No. 169
Confidence and Career Choices: An Experiment
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Confidence is often seen as the key to success. Empirical evidence about how such beliefs about one's abilities causally map into actions is, however, sparse. In this paper, we experimentally investigate the causal effect of an increase in confidence about one's own ability on two central choices made by workers in the labor market: choosing between jobs with different incentive schemes, and the subsequent choice of how much effort to exert within the job. An exogenous increase in confidence leads to an increase in subjects' propensity to choose payment schemes that depend heavily on ability. This is detrimental for low ability workers. Policy implications are discussed.
Keywords:
overconfidence; experiment; beliefs; real-effort; career choices;
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Discussion Paper No. 168
Meta-Analysis of Present-Bias Estimation Using Convex Time Budgets
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We examine 220 estimates of the present-bias parameter from 28 articles using the Convex Time Budget protocol. The literature shows that people are on average present biased, but the estimates exhibit substantial heterogeneity across studies. There is evidence of modest selective reporting in the direction of overreporting present-bias. The primary source of the heterogeneity is the type of reward, either monetary or non-monetary reward, but the effect is weakened after correcting for potential selective reporting. In the studies using the monetary reward, the delay until the issue of the reward associated with the "current" time period is shown to influence the estimates of present bias parameter.
Keywords:
present bias; structural behavioral economics; meta-analysis; selective reporting;
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Discussion Paper No. 167
The Formation of Prosociality: Causal Evidence on the Role of Social Environment
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This study presents descriptive and causal evidence on the role of social environment for the formation of prosociality. In a first step, we show that socio-economic status (SES) as well as the intensity of mother-child interaction and mothers' prosocial attitudes are systematically related to elementary school children's prosociality. In a second step, we present evidence on a randomly-assigned variation of the social environment, providing children with a mentor for the duration of one year. Our data include a two-year follow-up and reveal a significant and persistent increase in prosociality in the treatment relative to the control group. Moreover, enriching the social environment bears the potential to close the observed gap in prosociality between low and high SES children. A mediation analysis of the observed treatment effect suggests that prosociality develops in response to stimuli in the form of prosocial role models and intense social interactions.
Keywords:
formation of preferences; prosociality; social preferences; trust; social inequality;
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Discussion Paper No. 166
Socio-Economic Status and Inequalities in Children's IQ and Economic Preferences
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This paper explores inequalities in IQ and economic preferences between children from high and low socio-economic status (SES) families. We document that children from high SES families are more intelligent, patient and altruistic, as well as less risk-seeking. To understand the underlying causes and mechanisms, we propose a framework of how parental investments as well as maternal IQ and economic preferences influence a child's IQ and preferences. Within this framework, we allow SES to influence both the level of parental time and parenting style investments, as well as the productivity of the investment process. Our results indicate that disparities in the level of parental investments hold substantial importance for SES gaps in economic preferences and, to a lesser extent, IQ. In light of the importance of IQ and preferences for behaviors and outcomes, our findings offer an explanation for social immobility
Keywords:
socio-economic status; time preferences; risk preferences; altruism; experiments with children; origins of preferences; human capital;
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Discussion Paper No. 165
Trade Exposure and the Decline in Collective Bargaining: Evidence from Germany
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We analyze the effect of the increase in trade exposure induced by the rise of China and the transformation of Eastern Europe on collective bargaining coverage of German plants in the period 1996-2008. We exploit cross-industry variation in trade exposure and use trade flows of other high-income countries as instruments for German trade exposure. We find that increased import exposure has led to an increase in the probability of German plants leaving industry-wide bargaining agreements, accounting for about one fifth of the overall decline in the German manufacturing sector. The effect is most pronounced for small and medium-sized plants.
Keywords:
international trade; import competition; collective bargaining;
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Discussion Paper No. 164
An Economic Model of the Meat Paradox
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Many individuals have empathetic feelings towards animals but frequently consume meat. We investigate this "meat paradox" using insights from the literature on motivated reasoning in moral dilemmata. We develop a model where individuals form self-serving beliefs about the suffering of animals caused by meat consumption in order to alleviate the guilt associated with their dietary choices. The model makes several specific predictions: in particular, it predicts a positive relationship between individuals' taste for meat and their propensity to engage in self-deception, a high price elasticity of demand for meat, and a causal effect of prices and aggregate consumption on individual beliefs.
Keywords:
motivated reasoning; moral dilemmata; self-deception; meat paradox; meat price-elasticity; animal welfare;
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