<p dir="ltr">This dissertation investigates strategic decision-making under conditions of environmental inequality. The three chapters explore various forms of inequality across different decision contexts</p><p dir="ltr">The first chapter examines the impact of income inequality on individuals' participation in multiple public goods investments. Specifically, it analyzes how a global club good opportunity influences local public goods provision in indefinitely repeated interactions within a linear public goods game using a voluntary contribution mechanism. The study varies global club entry costs and local community endowment compositions to assess their effects on contributions and welfare. It finds that income inequality does not significantly alter contribution behaviors in single public good settings under indefinitely repeated interactions. With the introduction of a global club good, lower entry costs lead to higher participation rates among subjects, resulting in increased total welfare for both homogeneous and heterogeneous communities. Conversely, higher entry costs reduce participation and overall welfare. Heterogeneous communities discontinue club use sooner than homogeneous ones. Efficiency, measured as realized payoff relative to maximal social benefits, declines across all treatments following the introduction of a global club good. Additionally, counterfactual simulations using an individual evolutionary learning model demonstrate that the welfare benefits of a global club good opportunity hinge on its ability to yield substantial social benefits compared to local public goods.</p><p dir="ltr">The second chapter explores how power inequality influences cooperation in a dynamic game where competition and cooperation evolve over time. This research, conducted as part of a collaborative project with Yaroslav Rosokha, Denis Tverskoi, and Sergey Gavrilets, examines cooperation dynamics in scenarios where cooperation's benefits depend on political power derived from a contest. The study highlights that incumbency advantages in political contests precipitate a rapid breakdown of cooperation within social dilemmas. Furthermore, it investigates behavioral disparities between groups and individuals, leveraging simulations based on the Arifovic and Ledyard (2012) individual evolutionary learning model to shed light on the difference observed in the experiment.</p><p dir="ltr">The third chapter investigates the impact of unequal positions in a directed communication network on individuals' optimal stopping rules and social learning outcomes. The study involves subjects making predictions about uncertain states of the world using private information and social information obtained through a directed network. Theoretical predictions suggest that individuals should wait when the benefit of waiting exceeds the associated cost. Empirical results confirm that subjects indeed wait longer in more connected networks or when waiting costs are low. However, deviations from equilibrium predictions indicate influences of bounded rationality (supported by quantal response equilibrium) and heuristic decision-making, where some subjects consistently wait for a single turn regardless of positional advantage. Importantly, under-waiting at an information aggregator's position has negative externalities on group-wide information acquisition.</p>

<p dir="ltr">The rise of digital media has allowed for unprecedented access to information. In particular, people are able to form beliefs based on information sources that span the full spectrum of reputation, information quality, and motivated biases. Such access is a double-edged sword because “with great power, comes great responsibility” (“Spider-Man”, 2002). Heterogeneity in information quality may be due to a variety of factors, and it is often up to the consumer to consider quality signals when evaluating the quality of information. My research explores this complicated process, and contributes to the understanding of how people demand and utilize information in different environments. I do so over three chapters. The first studies how people respond to signals of information quality in a sequential prediction game. In the second chapter, biased incentives are introduced in a prediction game experiment to test how intrinsic and extrinsic biases affect demand and utilization of information. The third chapter contains a survey in which subjects report their valuations of an X account that varies on political affiliation, occupation credentials, and number of followers.</p><p dir="ltr">My first chapter focuses on how subjects respond to signals of information quality. In it, subjects predict which of two urns was randomly chosen in each of 30 rounds. They observe a private ball drawn from the selected urn each round to help them make their prediction. The color of the ball signals the urn it came from. The subjects then sequentially broadcast their belief about which urn was selected for the session without revealing the color of the observed ball. Future subjects can use the previous broadcasts to infer additional information that may help them accurately predict the urn.</p><p dir="ltr">In the control, subjects exhibit very low utilization of previous predictions when informing their own behavior. While consistent with prior research, behaving in such a manner is suboptimal. To experiment on the malleability of subjects’ beliefs about the rationality of others, I implement two novel treatments. In the first, the subjects’ prediction order in the last 15 rounds is determined by their accrued earnings in the first 15 rounds, with highest earners predicting first. The prediction order is similarly determined in the second treatment, except a quiz on conditional updating ability is used. Subjects who score the highest on the quiz predict first. In both cases, the sorting mechanism is explained to the subjects.</p><p dir="ltr">Sorting on earnings yields a modest increase in valuations of previous subjects’ predictions. A much more significant increase is observed when sorting on ability. Additionally, the subjects who make the fewest irrational predictions (ones against the color of the ball when they do not have additional information to suggest otherwise) are the ones who score the best in the ability sort. Placing them at the beginning of rounds increases the entire round’s average earnings.</p><p dir="ltr">My second chapter uses a similar environment to study the role that bias plays in demanding and utilizing information. In it, participants predict which of two states (red or blue) each of 30 rounds was assigned. To aid them, participants observe two predictions from ‘experts,’ who are informed by a private signal with a known precision. Participants can bid to receive additional information about the state from two sources: a private signal and another independent expert’s prediction. Both sources’ precision is known. This method is the first of its kind, and allows for direct comparison between information types. The bid results are revealed once this process is complete. Participants then predict the state.</p><p dir="ltr">Two innovative treatments are implemented to implement bias into the basic environment exogenously. In the first, participants receive a small bonus each time they predict the state is blue. In the second, experts receive the same bonus each time they predict the state is blue instead of the participants. Surprisingly, participants value the private signal and additional expert’s prediction similarly, except when the experts are biased. This is a departure from most research using similar environments, which assume that some sub-optimal behavior can be attributed to mistrust in others’ ability to understand the environment. That assumption may warrant further and more careful evaluation. The most striking valuation behavior is when participants are biased. Their bids are higher when their existing information set already favors their bias, relative to when it is against it. Doing so is antithetical to the rational equilibrium and inconsistent with prior research on confirmation bias.</p><p dir="ltr">Participants generally utilize information obtained from a successful bid at a lower rate when it is against the initial experts than with it. No difference is detected between information sources. This is expected, albeit inconsistent with rational decision-making. One exception is noted. When participants are biased, they use the newly obtained information at a much higher rate when it is consistent with their bias than against it. Doing so is at odds with bidding behavior, as it implies participants bid more to receive information that they utilize less. Participants generally do a much better job of rationalizing and responding to the experts’ bias than their own in the experiment.</p><p dir="ltr">My third chapter is motivated partly by the findings in my first two chapters, using a more contextualized setting. In it, subjects are presented with a series of X account versions. The versions vary on political affiliation, occupation credentials, and number of followers. Subjects are asked to rate how much they would value information from each account version. Subjects value account versions with an unrevealed political party affiliation more than their analogs which report a party affiliation, regardless of the party or the subject’s beliefs.</p><p dir="ltr">A partisan penalty is uniformly implemented. Additionally, credentials are insufficient to overcome bias concerns. The penalty assessed to an account version aligning with a party is similar when the version has high credentials versus when it does not. Followers are also a valuable resource, regardless of political affiliation or credential levels. The marginal value that followers provide is similar for all account versions, meaning that even relative experts in a field should seek validation if they want to be valued by others.</p><p dir="ltr">Previous research would expect subjects to value versions more when they are congruent with their own beliefs, so these findings are surprising. Two groups are identified as the most likely to deviate and value same-typed account versions more: subjects who believe echo chambers are good and subjects who are concerned they have believed fake news in the past. The former group does not require a significant number of followers to highly value a politically congruent account version. The latter value politically unaffiliated accounts even more, but are more skeptical of opposition account versions and are even more sensitive to the number of followers they have.</p><p dir="ltr">These three chapters explore new avenues for researching how biases and expertise are evaluated and responded to. People are generally much better at considering the potential biases that others have than rationalizing their own biases. I also find good news in an era of heightened concern about eroding trust in experts. In each case, subjects respond to signals of expertise, and demonstrate efforts to exploit the information that experts provide.</p>

The experiments presented and analyzed in this dissertation concern two well-established phenomena in behavioral economics: that human decision makers hold biased beliefs about probability and that free-form communication between economic agents promotes cooperation far in excess of what standard theory predicts. First, Chapter 2 studies subjective probability, focusing on the well-established existence of both the Hot Hand and Gambler's Fallacies — the false expectation of positive and negative autocorrelation, respectively. Both biases are prevalent throughout a wide variety of real-world contexts; what causes a person to favor one over the other? We conduct an experiment in which we observe fully informed subjects switching between the Hot Hand and Gambler's Fallacies when predicting future outcomes of mathematically identical sequences. Subjects exhibit the Gambler's Fallacy when predicting single outcomes but favor the Hot Hand when asked explicitly to estimate probabilities. Connecting our results to existing theory suggests that very subtle changes in framing lead decision makers to employ substantially different approaches to form predictions. The remainder of this dissertation studies cheap talk communication between human subjects playing incentivised trust games. In Chapter 3, we study free-form communication using a dataset of over 1000 messages sent between participants in a laboratory Trust game. We employ Natural Language Processing to systematically generate meaningful partitions of the messages space which we can then examine with established regression approaches. Our investigation reveals features correlated with trust that have not previously been considered. Most notably, highly detailed, specific promises establish trust more effectively than other messages which signal the same intended action. Additionally, we observe that the most and least trusted messages in our dataset differ starkly in their quality. Highly trusted messages are longer, more detailed, and contain fewer grammatical errors whereas the least trusted messages tend to be brief and prone to errors. In Chapter 4, we examine whether the difference is message quality affects trust by acting as a signal of effort. We report the results of an experiment designed to test whether promises which require higher levels of effort result in greater trust from their recipients. We find that more costly promises lead recipients to trust more frequently. However, there is no corresponding, significant difference in the trustworthiness of their senders. Further, when asked their beliefs explicitly, recipients do not believe that higher cost promises are more likely to be trustworthy. This presents a potential challenge to our understanding of trust between economic decision makers. If effort increases trust without altering receivers' beliefs, receivers must be concerned with factors other than their own payoff maximization. We conclude by presenting a follow-up experiment where varying effort cost cannot convey the sender's intentions, however, the results are inconclusive. / Doctor of Philosophy / This dissertation presents three projects in which we examine how human decision makers' choices differ from those predicted by standard economic theory. The experiments we conduct cover two broad topics: the way humans estimate the probability of random events and how communication leads to greater cooperation between agents with potentially conflicting monetary interests. It is well established that humans often hold distorted beliefs about probability. Depending on the direction of their bias, these beliefs are consistent with either the Hot Hand or Gambler's Fallacy. In Chapter 2, we examine the factors which may cause people to change the direction of their bias. Subjects exhibit the Gambler's Fallacy when predicting single outcomes, but favor the Hot Hand when asked explicitly to estimate probabilities. Chapters 3 and 4 study cheap talk communication between decision makers — messages which carry with them no commitment mechanism. It is no surprise to the average person that communication may enhance cooperation and trust between people. Experimental economists have verified this intuition in laboratory experiments and found that free-form communication is particularly effective. However, the precise mechanism through which free-form communication enhances cooperation is unclear. In Chapter 3, we collect a large dataset of free-form messages transmitted between players of an investment game. We then employ Natural Language Processing tools, novel to the Economics laboratory, to parse the unstructured data and identify message features associated with changes in trust and trustworthiness. Chapter 4 continues to examine communication, investigating whether the effort required to a promise affects its perceived or actual trustworthiness. We find that higher effort promises lead to greater trust, but find no corresponding increase in trustworthiness.

Der verhaltensökonomischen Literatur entsprechend behandeln die drei Kapitel dieser Dissertation unterschiedliche Aspekte des menschlichen Verhaltens, welches als "nicht-rational" zu bezeichnen ist. Jedes dieser Kapitel leistet einen Beitrag zum aktuellen Stand der Forschung auf dem Gebiet der Verhaltensökonomik mit Hilfe von entweder experimentellen, empirischen oder methodischen Ansätzen. Das erste Kapitel schlägt ein einfaches verhaltensökonomisches Modell vor und unterzieht dieses einer Reihe von experimentellen Tests. Das Modell erweitert die Literatur zur Fehlwahrnehmung von multiplikativen Wachstumsprozessen und hilft somit typische Fehlinvestitionen in der langen Frist zu erklären. Im Rahmen des zweiten Kapitels werden Daten einer Online-Kreditbörse genutzt, um empirisch zu untersuchen, ob sich private Investoren entsprechend den Vorhersagen der standardmäßigen ökonomischen Fachliteratur verhalten und einzig die erwartete Rendite berücksichtigen oder ob sie von anderen nicht-finanztechnischen Attributen eines Schuldners beeinflusst werden. Der Schwerpunkt der Analyse liegt dabei auf Geschlechterdiskriminierung im Rahmen dessen unterschiedliche Diskriminierungskonzepte getestet werden. Das dritte Kapitel wählt einen methodischen Ansatz und schlägt ein innovatives Experiment-Design vor, welches den empirisch gut dokumentierten Schwierigkeiten bzgl. der Angabe von subjektiven Wahrscheinlichkeiten von Teilnehmern an Umfragen und Laborexperimenten Rechnung trägt. Ein Binary-Choice-Ansatz eingebettet in ein adaptives Experiment-Design minimiert den Aufwand für die Befragten und ermöglich somit eine praktikable und effiziente Elizitierung der subjektiven Meinungen. / In the line with the literature on behavioral economics, the three chapters of this dissertation shed light on different aspects of human behavior that are at odds with rationality. Each chapter contributes to the existing behavioral economic research using either experimental, empirical, or methodological tools. First, by proposing and experimentally testing a simple behavioral model that extends the literature on the misperception of multiplicative growth processes, Chapter 1 aims to explain common money mistakes that people often make with long-term investments such as retirement savings plans. Second, in Chapter 2, real-life investment data of an online-lending platform are used to empirically investigate if private investors behave as the standard economic literature would predict and solely consider an investment’s expected return or if they also care about other non-financial attributes of a debtor. The focus of the analysis is on gender discrimination, thereby defining and econometrically testing different concepts of how investors discriminate between male and female borrowers. Third, Chapter 3 takes a methodological path and proposes a novel experimental design that accounts for the empirically well-documented difficulties that survey respondents typically have when asked to state subjective probabilities. A binary choice approach embedded in an adaptive experimental design helps to minimize effort of the respondents, thus allowing for a more practical belief elicitation in both the lab and the field.

Das Kerninteresse der Dissertation gilt den Einsatzmöglichkeiten ökonomischer Experimente in der Institutionenanalyse. Sie setzt sich aus einem konzeptionellen und vier empirischen Aufsätzen zusammen. Im ersten Aufsatz werden drei theoretische Blickwinkel auf institutionellen Wandel unterschieden. Diese werden dann mit empirischen Arbeiten in der experimentellen Wirtschaftsforschung in Beziehung gesetzt. Die empirischen Aufsätze greifen diese Überlegungen auf. Im zweiten Aufsatz findet für die Analyse der Verkehrsmittelwahl von Pendlern unter verschiedenen Politikszenarien ein „Framed Field Experiment“ Anwendung. Es wird gezeigt, wie Verlustaversion und Statusängste die Entscheidungen der Pendler erklären können. Im dritten Aufsatz kommt ein „Public Goods Game“ zum Einsatz, um den Einfluss von ökonomischer Ungleichheit und Vorbildverhalten auf Beiträge zu einer gemeinsam genutzten sanitären Einrichtung zu untersuchen. In einer strukturell ähnlichen Entscheidungssituation verhalten sich Teilnehmerinnen häufig so wie es ihnen aus anderen Zusammenhängen bekannt ist. Der vierte Aufsatz untersucht den Einfluss des sogenannten Status-Quo-Effekts auf umweltfreundliches Verhalten. In einem Feldexperiment wird gezeigt, dass sich ein Zwang zur Entscheidung positiv auf umweltfreundliches Verhalten auswirken kann. Der fünfte Aufsatz geht der Frage nach, ob sich Experimente als didaktisches Werkzeug zur Schaffung größeren Umweltbewusstseins einsetzen lassen. Im Vergleich zu einer Kontrollgruppe zeigen selbst Teilnehmende mit negativen Erfahrungen aus dem Experiment einen positiven Effekt auf umweltfreundliches Verhalten. In einem Fazit findet eine Synthese der Aufsätze statt. Ein Ergebnis ist die Entwicklung eines analytischen Rahmens für die Durchführung ökonomischer Experimente zur Untersuchung institutionellen Wandels. Konstitutionelle Regeln, also Regeln zur Änderung von Regeln, werden als erfolgversprechender Ansatzpunkt für die zukünftige Forschung identifiziert. / The dissertation focuses on the use of economic experiments for institutional analysis. It consists of one conceptual and four empirical essays. In the first essay, three theoretical perspectives on institutional change are distinguished. These are linked to empirical work in Experimental Economics. The empirical essays expand on these considerations. In the second essay, commuters’ transportation mode choice is analyzed. It is shown that loss aversion and status concerns drive behavior. In the third essay, a public goods game is employed to investigate the effect of endowment heterogeneity and leading by example on voluntary contributions to a jointly used sanitation facility. It is demonstrated that in a structurally similar decision context, choices are driven by experiences from other contexts. The fourth essay examines the impact of the so-called status quo bias on pro-environmental behavior. In a field experiment, it is shown that forcing a decision has a positive effect on pro-environmental behavior. The fifth essay investigates whether experiments can be used as a tool for environmental awareness building. Even participants with negative experiences from taking part in the dilemma experiment show a greater likeliness of behaving environmentally friendly in comparison to a control group. In a concluding part, the essays are synthesized. One outcome is an analytical framework for developing economic experiments on institutional change. Constitutional rules (i.e., rules on how to change the rules) are identified as a promising starting point for future research.

Die Arbeit basiert auf fünf Aufsätzen. In diesen wird über vier Experimentserien berichtet, die das individuelle Entscheidungsverhalten von Versuchspersonen in ähnlichen, aber verschieden komplexen Situationen erheben. Es wird ein experimentelles Szenario vorgestellt, mit dessen Hilfe Rückschlüsse auf das Sparverhalten gezogen werden können. Es werden stilisierte Fakten des Verhaltens realer Entscheider identifiziert, die sich in solchen Situationen wesentlich vom rationalen Verhalten des "homo oeconomicus" unterscheiden. Eine der Experimentserien wurde im Internet durchgeführt, wobei zusätzlich generelle Aspekte von Internetexperimenten untersucht werden. / This thesis is based on five studies. These studies report on the individual behavior of experimental subjects in four experiments. The experimental situations are similar, but differ in their complexity. With the introduced experimental setup, one can draw conclusions about savings behavior. Stylized facts about the behavior of real decision makers are identified, which differ in such situations substantially from the rational behavior of the "homo oeconomicus". One of the experiments was conducted via the Internet. In this part also general aspects of Internet experiments are investigated.

Diese Dissertation analysiert eine Vielzahl von Aspekten, die sich auf Patente und Patentrennen beziehen. Im einleitenden Kapitel wird die betriebs- und volkswirtschaftliche sowie die gesellschaftliche und ethische Bedeutung von Patenten hervorgehoben. Es werden sowohl Stärken als auch Nachteile von Patenten vorgestellt. Kapitel 2 beschreibt Instrumente, die von Entscheidungsträgern benutzt werden können, um Patentschutz zu regulieren: Patentbreite, -höhe und -länge. Das Kapitel zeigt weiterhin, warum ein optimales Regulierungsniveau nicht erreicht werden kann. Kapitel 3 behandelt den dramatischen Anstieg von Patenttätigkeiten in Europa als auch weltweit. Erklärende Faktoren für dieses Phänomen sowie Effekte und mögliche Lösungen werden diskutiert. Im vierten Kapitel wird gezeigt, dass Patente zu einem großen Gewinnzuwachs in der Pharmaindustrie beigetragen haben, während die Innovationsfähigkeit dieser Industrie gesunken ist. Patentrennen für Pharmaka und die Entwicklung von Generika werden auch in diesem Kapitel analysiert. Kapitel 5 gibt einen umfangreichen Überblick der Literatur zum Patentrennen und zeigt, dass diese Literatur extrem komplex, widersprüchlich, instabil bei experimenteller Überprüfung und allgemein uneindeutig ist. Kapitel 6 stellt eine experimentelle Studie eines Patentrennens vor. Es beginnt mit einem intuitiven Modell eines Segelwettbewerbs; danach wird ein spieltheoretisches Modell eines asymmetrischen F&E-Wettbewerbs zwischen zwei Firmen entwickelt; später werden Gleichgewichtsvoraussagen formuliert und mit den Handlungen realer Entscheidungsträger in einem experimentellen Labor verglichen. Eine ökonometrische Untersuchung zeigt ein hohes Maß an Übereinstimmung zwischen den theoretischen Vorhersagen und den experimentellen Ergebnissen. Das letzte Kapitel fasst die Schlussfolgerungen der Dissertationen zusammen und bietet Empfehlungen. / This dissertation analyzes a plethora of aspects related to patents and patent races. In the introductory chapter the importance of patents to business, economics, society and ethics is emphasized. On one side, the traditional argument in favor of patent protection as well as further strengths of patents are presented, while on the other side situations in which patents bring significant drawbacks and disadvantages are identified. Chapter 2 describes the instruments that can be used by policymakers to regulate patent protection: patent breadth, height and length. The chapter further shows why an optimal level of regulation cannot be achieved. Chapter 3 deals with the dramatic increase in patenting activities in Europe and around the world. Determinants of this phenomenon as well as its effects and potential solutions are provided. In the fourth chapter patents are shown to have contributed to a large rise of profits in the pharmaceutical industry, while the industry’s innovativeness seems to have declined. Patent races for pharmaceuticals and the evolution of generic medicine are also analyzed in this chapter. Chapter 5 gives an extensive overview of the patent race literature and shows that this literature is extremely complex, filled with contradictions, not robust to experimental testing and overall inconclusive. Chapter 6 sets out an experimental study of a patent race. It starts from an intuitive model of a sailing race, develops a game-theoretic model of an asymmetric R&D competition between two firms who want to attain a patent, formulates equilibrium predictions and compares them with the actions of real decision makers in an experimental laboratory. An econometric analysis proves a high degree of consistency between theoretical predictions and experimental results. The last chapter wraps up the main conclusions of the dissertation and proposes some recommendations.

Kapitel 1: Narrative persuasion (mit Kai Barron) Anhand eines Experiments untersuchen wir die Verwendung von Narrativen in einem Kontext in dem Sender:innen möglicherweise andere Anreize haben als Empfänger:innen. Unsere Ergebnisse zeigen, dass Sender:innen eigennützige Narrative konstruieren und sie auf objektive Informationen zuschneiden. Desweiteren finden wir, dass Sender:innen in der Lage sind, die Erwartungen von Empfänger:innen zu verändern. Drittens ermitteln wir, dass Empfänger:innen Narrative überzeugend finden, die gut zu den objektiven Informationen passen. Schließlich stellen wir fest, dass es schwierig ist, gegen narratives Überreden zu schützen. Kapitel 2: Signaling motives in lying games Dieses Kapitel untersucht ein Lügenspiel, in dem Agent:innen ihren moralischen Typ signalisieren. In der theoretischen Analyse zeigt sich ein Signalisierungsmotiv, bei dem es den Agent:innen missfällt, der Lüge verdächtigt zu werden, und bei dem einige Lügen stärker stigmatisiert werden als andere. Die Gleichgewichtsvorhersage des Modells kann experimentelle Daten aus früheren Studien erklären. Ich verdeutliche die Beziehung des untersuchten Modells zu Modellen in denen Agent:innen eine Abneigung haben, des Lügens verdächtigt zu werden und biete Anwendungen auf Narrative, Lernen und das Offenlegen von Lügen. Kapitel 3: Because I don't deserve it: Entitlement and lying (mit Daniel Parra) Wir untersuchen die Auswirkungen von Anspruchsdenken auf die Bereitschaft zu lügen. In einem Laborexperiment erhalten Teilnehmer:innen entweder ein hohes oder niedriges Einkommen. Das Einkommen wird entweder leistungsabhängig oder unabhängig gezahlt. Die Ergebnisse zeigen folgendes: Unter Teilnehmer:innen die ein leistungsabhängiges Einkommen erhalten haben, lügen diejenigen, die weniger Geld verdient haben, weniger als diejenigen, die mehr verdient haben. Wir finden keine Unterschiede bei denjenigen die lügen können, um leistungsunabhängiges Einkommen zu behalten. / Chapter 1: Narrative persuasion (with Kai Barron) Using an experiment, we examine the use of narratives as a persuasive tool in a context where senders may hold incentives that differ from those of receivers. Our results reveal several insights about the underlying mechanisms that govern narrative persuasion. First, we show that advisors construct self-interested narratives and make them persuasive by tailoring them to fit the objective information. Second, we demonstrate that advisors can shift investors' beliefs about the future performance of a company. Third, we identify the types of narratives that investors find convincing. Finally, we find that narrative persuasion is difficult to protect against. Chapter 2: Signaling motives in lying games This chapter studies the implications of agents signaling their moral type in a lying game. In the theoretical analysis, a signaling motive emerges where agents dislike being suspected of lying and where some lies are more stigmatized than others. The equilibrium prediction of the model can explain experimental data from previous studies, on partial lying, where individuals lie to gain a non-payoff-maximizing amount. I discuss the relationship with theoretical models of lying that conceptualize the image concern as an aversion to being suspected of lying and provide applications to narratives, learning, and the disclosure of lies. Chapter 3: Because I don't deserve it: Entitlement and lying (with Daniel Parra) We study the effect of entitlement on the willingness to lie. In a laboratory experiment, participants receive either a high or low endowment. In one treatment, the allocation depends on participants' performance, and in the other, it depends on random draw. Our study shows that entitlement influences lying in an intuitive direction: when performance determines income, those who earn less money lie less than those who earn more. We do not find differences in lying when participants lie to keep windfall endowments.

為瞭解兒童在認知發展行為的表現，本研究招募國小一年級學童56名，五年級學童32名參與實驗進行。應用囚犯困境賽局與最後通牒賽局之架構設計兩個遊戲，來檢測兒童在合作與分享行為之表現。分析受試者之背叛比率、提供數量、拒絕比率等實驗資料，來檢測年齡、性別以及長幼關係是否會造成顯著影響。 實驗結果發現： （1）年齡較大兒童較傾向較合作且拒絕比率較低，這個結果和認知發展理論的結論一致。 （2）受試者資料在性別效果的假設檢定結果都不顯著。 （3）年齡較小兒童的平均提供數量都大於一半，這個結果和最後通牒賽局的理論預測相反。（4）對手為不同年齡時的背叛比率和拒絕比率都比對手為同年齡時低，這個結果支持國小開設混齡教育課程。 / This paper studies children’s behavior in an ultimatum game and a prisoner’s dilemma game with 56 children of age 7 and 32 children of age 11. With the experimental data of defect ratio, offer quantity and rejection ratio, we tested the age, sex and seniority effects under these two games. The experimental findings are as follows. （1）The older children are more cooperative and have lower rejection ratio than younger ones. These results are consistent with the developmental psychology theories. （2） We observe no significant sex effect in the three tests. （3） For younger children, the average offer quantity is higher than fifty percent, this is different from theoretical prediction and literature results.（4）We found that for pairs consisting of subjects of different ages, The defect ratio and rejection ratio are lower than pairs of the same age subjects. This evidence may provide support for mixed-age education program for some courses in elementary school.

Cooperative, altruistic and fairness-exhibiting behavior is an important topic in evolutionary and behavioral biology and the mechanisms leading to its evolution, ultimate as well as proximate precursors, are subject of much research in biological as well as social sciences, theoretical as well as experimental work. In light of the life history theory, I focused on the connection of one's health state and cooperative behavior in humans and tested the hypothesis that more healthy individuals would manifest more cooperative tendencies (as they would have more opportunities of future interactions and long-term benefits), and conversely. The data, obtained from a sample of university students engaged in experimental games (Dictator Game, Ultimatum Game, Expanded Ultimatum Game, Trust Game, and Reversed Dictator Game) and a health and personality-focused questionnaire, did not corroborate this hypothesis. My other hypotheses - that better memory and lower temporal discounting would be related to more cooperative behavior (stemming from the conditions for reciprocal cooperation) - were supported by the data, albeit only partially in the case of memory. I also used the data from the five experimental games to briefly describe the proportions of different types of behavior (self-regarding, altruistic,...