A02
Biased Beliefs in Dynamic Decisions in Competitive Markets
Discussion Papers

Discussion Paper No. 372
January 23, 2023

Causal Misperceptions of the Part-Time Pay Gap

Author:

Annekatrin Schrenker (DIW Berlin and FU Berlin)

Abstract:

This paper studies if workers infer from correlation about causal effects in the context of the part-time wage penalty. Differences in hourly pay between full-time and part-time workers are strongly driven by worker selection and systematic sorting. Ignoring these selection effects can lead to biased expectations about the consequences of working part-time on wages (`selection neglect bias'). Based on representative survey data from Germany, I document substantial misperceptions of the part-time wage gap. Workers strongly overestimate how much part-time workers in their occupation earn per hour, whereas they are approximately informed of mean full-time wage rates. Consistent with selection neglect, those who perceive large hourly pay differences between full-time and part-time workers also predict large changes in hourly wages when a given worker switches between full-time and part-time employment. Causal analyses using a survey experiment reveal that providing information about the raw part-time pay gap increases expectations about the full-time wage premium by factor 1.7, suggesting that individuals draw causal conclusions from observed correlations. De-biasing respondents by informing them about the influence of worker characteristics on observed pay gaps mitigates selection neglect. Subjective beliefs about the part-time/full-time wage gap are predictive of planned and actual transitions between full-time and part-time employment, necessitating the prevention of causal misperceptions.

Keywords:

part-time pay gap; wage expectations; selection neglect; causal misperceptions;

JEL-Classification:

J31; D83; D84;

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Discussion Paper No. 363
January 4, 2023

The Effect of Pension Wealth on Employment

Author:

Sebastian Becker (DIW Berlin, FU Berlin)
Hermann Buslei (DIW Berlin)
Johannes Geyer (DIW Berlin)
Peter Haan (DIW Berlin, FU Berlin)

Abstract:

This study provides novel evidence about the pension wealth elasticity of employment. For the identification we exploit reform-induced variation of pension wealth that is related to the number of children but which does not affect the implicit tax rate of employment. We use a difference-in-differences estimator based on administrative data from the German pension insurance and find that, on average, the negative employment effect of pension wealth is significant and economically important. Heterogeneity analyses document a strong age pattern showing that the employment effects are driven by behavioral responses of women close to retirement. The age pattern is partly explained by the positive effect of pension wealth on disability pensions after the age of 60.

Keywords:

pension reform; pension wealth elasticity; female labour supply; retirement; difference in differences;

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Discussion Paper No. 337
November 30, 2022

Non-Additivity of Subjective Expectations over Different Time Intervals

Author:

Peter Haan (FU Berlin, DIW Berlin)
Chen Sun (HU Berlin)
Uwe Sunde (LMU Munich)
Georg Weizsäcker (HU Berlin)

Abstract:

We examine the additivity of stock-market expectations over different time intervals. When asked about a ten-year interval, survey respondents expect a stock-price change that is not equal to, but closer to zero than, the sum of their expectations over two shorter time intervals that cover the same ten years. Such sub-additivity is irrational in that it cannot stem from aggregating short-term expectations. Model estimates show that the pattern is consistent with a time perception where shorter time intervals have a proportionally larger weight. We also find that the respondents' degree of additivity is correlated with making larger financial investments.

Keywords:

expectation formation; time perception; sub-additivity; super-additivity;

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Discussion Paper No. 325
April 25, 2022

Explicit and Implicit Belief-Based Gender Discrimination: A Hiring Experiment

Author:

Kai Barron (WZB Berlin)
Ruth Ditlmann (Hertie School Berlin)
Stefan Gehrig (WZB Berlin)
Sebastian Schweighofer-Kodritsch (HU Berlin)

Abstract:

Understanding discrimination is key for designing policy interventions that promote equality in society. Economists have studied the topic intensively, typically taxonomizing discrimination as either taste-based or (accurate) statistical discrimination. To reveal the limitations of this taxonomy and enrich it psychologically, we design a hiring experiment that rules out (by design) both of these sources of discrimination with respect to gender. Yet, we still detect substantial discrimination against women. We provide evidence of two forms of discrimination, explicit and implicit belief-based discrimination. Both rely on statistically inaccurate beliefs but differ in how clearly they reveal that the choice was based on gender. Our analysis highlights the central role played by contextual features of the choice setting in determining whether and how discrimination will manifest. We conclude by discussing how policy makers may design effective regulation to address the specific forms of discrimination identified in our experiment.

Keywords:

discrimination; hiring decisions; gender; beliefs; experiment;

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Discussion Paper No. 313
January 21, 2022

House Price Expectations

Author:

Niklas Gohl (DIW Berlin, University of Potsdam)
Peter Haan (FU Berlin, DIW Berlin, Netspar)
Claus Michelsen (DIW Berlin, Leuphana University Lueneburg)
Felix Weinhardt (European University Viadrina, DIW Berlin)

Abstract:

This study examines short-, medium-, and long-run price expectations in housing markets. We derive and test six hypothesis about the incidence, formation, and relevance of price expectations. To do so, we use data from a tailored household survey, past sale and rental offerings, satellites, and from an information RCT. As novel findings, we show that price expectations exhibit mean reversion in the long-run. Moreover, we do not find evidence for biases related to individual housing tenure decisions or regret aversion. Confirming existing findings, we show that local market characteristics matter for expectations throughout, as well as aggregate price information. Lastly, we corroborate existing evidence that expectations are relevant for portfolio choice.

Keywords:

housing markets; price expectations;

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Discussion Paper No. 308
December 27, 2021

The Bargaining Trap

Author:

Sebastian Schweighofer-Kodritsch (HU Berlin)

Abstract:

I revisit the Rubinstein (1982) model for the classic problem of price hag- gling and show that bargaining can become a “trap,” where equilibrium leaves one party strictly worse off than if no transaction took place (e.g., the equilibrium price exceeds a buyer’s valuation). This arises when one party is impatient about capturing zero surplus (e.g., Rubinstein’s example of fixed bargaining costs). Augmenting the protocol with unilateral exit options for responding bargainers generally removes the trap.

Keywords:

alternating offers; bargaining; time preferences; haggling costs; outside options;

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Discussion Paper No. 302
November 29, 2021

The Effects of an Increase in the Retirement Age on Health - Evidence from Administrative Data

Author:

Peter Haan (DIW Berlin, FU Berlin, Netspar)
Mara Barschkett (DIW Berlin, FU Berlin)
Johannes Geyer (DIW Berlin, Netspar)
Anna Hammerschmid (DIW Berlin)

Abstract:

This study analyzes the causal effect of an increase in the retirement age on health. We exploit a sizable cohort-specific pension reform for women using two complementary empirical approaches – a Regression Discontinuity Design and a Difference-in-Differences approach. The analysis is based on official records covering all individuals insured by the public health system in Germany and including all certified diagnoses by practitioners. This enables us to gain a detailed understanding of the multi-dimensionality in these health effects. The empirical findings reflect the multi-dimensionality but allow for deriving two broader conclusions. We provide evidence that the increase in the retirement age negatively affects health outcomes as the prevalence of several diagnoses, e.g., mental health, musculoskeletal diseases, and obesity, increases. In contrast, we do not find support for an improvement in health related to a prolonged working life since there is no significant evidence for a reduction in the prevalence of any health outcome we consider. These findings hold for both identifica- tion strategies, are robust to sensitivity checks, and do not change when correcting for multiple hypothesis testing.

Keywords:

Germany; retirement; pension reform; health; ICD-10; regression discontinuity design; difference-in-differences;

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Discussion Paper No. 273
November 10, 2021

Alcohol and Short-Run Mortality: Evidence from a Modern-Day Prohibition

Author:

Kai Barron (WZB Berlin)
Debbie Bradshaw (SAMRC, University of Cape Town)
Charles D. H. Parry (SAMRC, Stellenbosch University)
Rob Dorrington (University of Cape Town)
Pam Groenewald (SAMRC)
Ria Laubscher (SAMRC)
Richard Matzopoulos (SAMRC, University of Capetown)

Abstract:

On July 13, 2020 a complete nation-wide ban was placed on the sale and transport of alcohol in South Africa. This paper evaluates the impact of this sudden and unexpected five-week alcohol prohibition on mortality due to unnatural causes. We find that the policy reduced the number of unnatural deaths by 21 per day, or approximately 740 over the five-week period. This constitutes a 14% decrease in the total number of deaths due to unnatural causes. We argue that this represents a lower bound on the impact of alcohol on short-run mortality, and underscores the severe influence that alcohol has on society—even in the short-run.

Keywords:

alcohol; mortality; economics; health; South Africa; COVID-19; violence;

JEL-Classification:

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Discussion Paper No. 257
November 9, 2021

Do Women Expect Wage Cuts for Part-Time Work?

Author:

Annekatrin Schrenker (DIW Berlin, FU Berlin)

Abstract:

Wage expectations for full- and part-time employment are key for understanding the labor supply decisions of women. However, whether women expect different wages between part-time and full-time work is not fully understood. Using German survey data, I quantify the expected full-time/part-time wage differential for a representative sample of female workers. I document that women, on average, expect only minor part-time wage penalties (1-3 percent). Comparing beliefs to selectivity-adjusted estimates of the part-time wage gap indicates that women’s mean expectations are realistic. I also show that women with children and those in managerial positions expect sizeable part-time wage cuts, with mothers overestimating the part-time wage penalty.

Keywords:

expectations; female labor supply; part-time wage gap;

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Discussion Paper No. 254

Bargaining and Time Preferences: An Experimental Study

Author:

Jeongbin Kim (National University of Singapore)
Wooyoung Lim (The Hong Kong University of Science and Technology)
Sebastian Schweighofer-Kodritsch (HU Berlin)

Abstract:

We generalize the Rubinstein (1982) bargaining model by disentangling payoff delay from bargaining delay. We show that our extension is isomorphic to generalized discounting with dynamic consistency and characterize the unique equilibrium. Using a novel experimental design to control for various confounds, we then test comparative statics predictions with respect to time discounting. All bargaining takes place within a single experimental session, so bargaining delay is negligible and dynamic consistency holds by design, while payoff delay per disagreement round is significant and randomized transparently at the individual level (week/month, with/without front-end delay). In contrast to prior experiments, we obtain strong behavioral support for the basic predictions that hold regardless of the details of discounting. Testing differential predictions of different forms of discounting, we strongly reject exponential discounting in favor of present-biased discounting.

Keywords:

alternating-offers bargaining; time preferences; present bias; laboratory experiments;

JEL-Classification:

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