Social and Behavioral Sciences Commons^™

Blood Lipids, Infection, And Inflammatory Markers In The Tsimane Of Bolivia, Sarinnapha Vasunilashorn, Eileen M. Crimmins, Jung Ki Kim, Jeff Winking, Michael Gurven, Hillard Kaplan, Caleb Finch

ESI Publications

Objectives—Little is known about blood cholesterol (blood-C) levels under conditions of infection and limited diet. This study examines blood-C and markers of infection and inflammation in the Tsimane of the Bolivian Amazon, indigenous forager farmers living in conditions that model preindustrial European populations by their short life expectancy, high load of infections and inflammation, and limited diets.

Methods—We use multivariate models to determine the relationships between lipid levels and markers of infection and inflammation. Adult Tsimane (N = 418, age 20–84) were characterized for blood lipids, cells, and inflammatory markers in relation to individual loads of parasites and …

The Social Strategy Game: Resource Competition Within Female Social Networks Among Small-Scale Forager-Horticulturalists, Stacey L. Rukas, Michael Gurven, Hillard Kaplan, Jeffrey Winking

ESI Publications

This paper examines social determinants of resource competition among Tsimane Amerindian women of Bolivia. We introduce a semi-anonymous experiment (the Social Strategy Game) designed to simulate resource competition among women. Information concerning dyadic social relationships and demographic data were collected to identify variables influencing resource competition intensity, as measured by the number of beads one woman took from another. Relationship variables are used to test how the affiliative or competitive aspects of dyads affect the extent of prosociality in the game. Using a mixed-modeling procedure, we find that women compete with those with whom they are quarreling over accusations of …

Multi-Player Bargaining With Endogenous Capacity, Gabriele Camera, Cemil Selcuk

Economics Faculty Articles and Research

We study equilibrium prices and trade volume in a market with several identical buyers and a seller who commits to an inventory and then offers goods sequentially. Prices are determined by a strategic costly bargaining process with a random sequence of proponents. A unique subgame perfect equilibrium exists, characterized by no costly delays and heterogeneous sale prices. In equilibrium constraining capacity is a bargaining tactic the seller uses to improve a weak bargaining position. With capacity constraints, sale prices approach the outcome of an auction as bargaining costs vanish. The framework provides a building block for price formation in models …

Can Markets Save Lives? An Experimental Investigation Of A Market For Organ Donations, Cary Deck, Erik O. Kimbrough

ESI Working Papers

Many people die while waiting for organ transplants even though the number of usable organs is far larger than the number needed for transplant. Governments have devised many policies aimed at increasing available transplant organs with variable success. However, with few exceptions, policy makers are reluctant to establish markets for organs despite the potential for mutually beneficial exchanges. We ask whether organ markets could save lives. Controlled laboratory methods are ideal for this inquiry because human lives would be involved when implementing field trials. Our results suggest that markets can increase the supply of organs available for transplant, but that …

Capm In Up And Down Markets: Evidence From Six European Emerging Markets, Jianhua Zhang, Clas Wihlborg

Business Faculty Articles and Research

The pricing of equity in six European emerging capital markets is analysed using both the conventional CAPM and a ‘conditional’ CAPM wherein up and down markets are separated. International influences on the stock markets are also analysed. The empirical evidence from a sample of 1,131 firms from the six markets indicates that there exists a significant relationship between beta and returns when up and down markets are separated. The international CAPM performs well in some markets that have become increasingly integrated with the world market. The general implication of the analysis is that beta can be a useful risk-measure for …

Deposit Insurance Coverage, Ownership, And Banks' Risk-Taking In Emerging Markets, Apanard P. Angkinand, Clas Wihlborg

Business Faculty Articles and Research

We ask how deposit insurance systems and ownership of banks affect the degree of market discipline on banks' risk-taking. Market discipline is determined by the extent of explicit deposit insurance, as well as by the credibility of non-insurance of groups of depositors and other creditors. Furthermore, market discipline depends on the ownership structure of banks and the responsiveness of bank managers to market incentives. An expected U-shaped relationship between explicit deposit insurance coverage and banks' risk-taking is influenced by country specific institutional factors, including bank ownership. We analyze specifically how government ownership, foreign ownership and shareholder rights affect the disciplinary …

The Impact Of Monetary Regimes On International Trade Are Eu Experiences Relevant For Asia?, Apanard P. Angkinand, Clas Wihlborg

Business Faculty Articles and Research

We extend much research that has been devoted to the effects of the European Monetary Union (EMU) on international trade by introducing monetary regime variables in bilateral export equations with the objective of capturing the effects on trade of changes in monetary regimes relative to the pure EMU effects. To make the analysis relevant from an Asian perspective trade effects of the EU’s internal markets are also separated from EMU effects. To identify these different effects we include three groups of countries in our sample: EMU countries which are also members of the EU, EU countries outside the EMU and …

Endogenous Oca (Optimum Currency Area) Analysis And The Early Euro Experience, Thomas D. Willett, Orawan Permpoon, Clas Wihlborg

Business Faculty Articles and Research

Some have argued that the endogenous responses to the formation of a currency area are so strong that one need not worry about optimum currency area conditions ex ante. We argue that this is much too strong a conclusion. We draw on a number of recent studies to evaluate the endogeneity experiences of the eurozone in three major areas; trade flows, business cycle synchronisation and structural reforms to improve labour and product market flexibility. Simple before-and-after comparisons are insufficient for analysis of endogeneity. The experiences of non-euro Western European economies suggest that broader trends also had considerable influence on trade …

Financial Liberalization And Banking Crises: A Cross-Country Analysis, Apanard P. Angkinand, Wanvimol Sawangngoenyuang, Clas Wihlborg

Business Faculty Articles and Research

Several studies indicate that financial liberalization contributes to the likelihood of a financial crisis. We focus on banking crises and argue that they are most likely to occur after an intermediate degree of liberalization. Using a recently updated dataset for financial reforms in 48 countries between 1973 and 2005, we find an inverted U-shaped relationship between liberalization and the likelihood of crisis. We ask whether the relationship remains when institutional characteristics of countries and dynamic effects of liberalization are considered. The empirical results indicate that the relationship between liberalization and banking crises depends strongly on the strength of capital regulation …

Domestication Alone Does Not Lead To Inequality: Intergenerational Wealth Transmission Among Horticulturalists, Michael Gurven, Monique Borgerhoff Mulder, Paul L. Hooper, Hillard Kaplan, Robert Quinlan, Rebecca Sear, Eric Schniter, Christopher Von Rueden, Samuel Bowles, Tom Hertz, Adrian Bell

Psychology Faculty Articles and Research

We present empirical measures of wealth inequality and its intergenerational transmission among four horticulturalist populations. Wealth is construed broadly as embodied somatic and neural capital, including body size, fertility and cultural knowledge, material capital such as land and household wealth, and relational capital in the form of coalitional support and field labor. Wealth inequality is moderate for most forms of wealth, and intergenerational wealth transmission is low for material resources and moderate for embodied and relational wealth. Our analysis suggests that domestication alone does not transform social structure; rather, the presence of scarce, defensible resources may be required before inequality …

An Experimental Analysis Of The Demand For Payday Loans, Bart J. Wilson, David W. Findlay, James W. Meehan Jr., Charissa P. Wellford, Karl Schurter

Economics Faculty Articles and Research

The payday loan industry is one of the fastest growing segments of the consumer financial services market in the United States. We design an environment similar to the one that payday loan customers face and then conduct a laboratory experiment to examine what effect, if any, the existence of payday loans has on individuals' abilities to manage and to survive financial setbacks. Our primary objective is to examine whether access to payday loans improves or worsens the likelihood of financial survival in our experiment. We also test the degree to which people's use of payday loans affects their ability to …

Did I Do That? Group Positioning And Asymmetry In Attributional Bias, Brian Gunia, Brice Corgnet

Economics Faculty Articles and Research

A laboratory experiment examined whether one structural feature of groups—members’ physical positioning—may produce asymmetry in their perceived contribution to a task. In particular, we investigated asymmetry in group members’ (often excessive) claims of credit for collective tasks ("the self-serving attributional bias"). Consistent with the availability account of this bias, group members located in the middle of a group, with easy visual access to their partners’ contributions, demonstrated less bias than outside members (who demonstrated bias consistent with prior research)—but no less satisfaction. Further analyses suggested that these results reflected bias reduction among middle members and did stem from visual availability. …

Team Formation And Self‐Serving Biases, Brice Corgnet

Economics Faculty Articles and Research

There is extensive evidence which indicates that people learn positively about themselves. We build on this finding to develop a model of team formation. We show that under complete information learning positively about oneself prevents efficient team formation. Agents becoming overconfident tend to ask for an excessive share of the group outcome. Positive learning generates divergence in workers' beliefs and hampers efficient team formation. Interestingly, in a context of incomplete information regarding the partner's ability, extensive learning biases may reduce the divergence in agents' beliefs and facilitate efficient team formation as a result. We apply our model to coauthorship and …

Product Innovation And Stability Of Collusion, Sougata Poddar, Bibhas Saha

Economics Faculty Articles and Research

We study the nature of market competition in relation to stability of collusion in the infinitely repeated play of a twostage game of product innovation and market competition, and show that cooperation in giving R&D efforts is more easily sustained when firms compete in quantity than in price.

Visibility Of Contributions And Cost Of Information: An Experiment On Public Goods, Anya Savikhin, Roman M. Sheremeta

ESI Working Papers

We experimentally investigate the impact of visibility of information about contributors on contributions in the public goods game. We systematically consider several treatments that are similar to a wide range of situations in practice. First, we vary the cost of viewing identifiable information about contributors. Second, we vary recognizing all, top or bottom contributors. We find that recognizing all contributors significantly increases contributions relative to the baseline. Recognizing only the top contributors is not significantly different from not recognizing contributors, but recognizing only the bottom contributors is as effective as recognizing all contributors. When viewing information about contributors is costly, …

Fight Or Flight? Defending Against Sequential Attacks In The Game Of Siege, Cary Deck, Roman M. Sheremeta

ESI Working Papers

This paper examines theory and behavior in a two-player game of siege, sequential attack and defense. The attacker’s objective is to successfully win at least one battle while the defender’s objective is to win every battle. Theoretically, the defender either folds immediately or, if his valuation is sufficiently high and the number of battles is sufficiently small, then he has a constant incentive to fight in each battle. Attackers respond to defense with diminishing assaults over time. Consistent with theoretical predictions, our experimental results indicate that the probability of successful defense increases in the defenders valuation and it decreases in …

Affecting Policy By Manipulating Prediction Markets: Experimental Evidence, Cary Deck, Shengle Lin, David Porter

ESI Working Papers

Documented results indicate prediction markets effectively aggregate information and form accurate predictions. This has led to a proliferation of markets predicting everything from the results of elections to a company’s sales to movie box office receipts. Recent research suggests prediction markets are robust to manipulation attacks and resulting market outcomes improve forecast accuracy. However, we present evidence from the lab indicating that single‐minded, well‐funded manipulators can in fact destroy a prediction market’s ability to aggregate informative prices and mislead those who are making forecasts based upon market predictions. However, we find that manipulators primarily influence market trades meaning outstanding bids …

Personality And The Consistency Of Risk Taking Behavior: Experimental Evidence, Cary Deck, Jungmin Lee, Javier Reyes

ESI Working Papers

Researchers have found that an individual’s risk attitude is not stable across elicitation methods. Results reported by Deck et al. (2009) suggest that personality may help explain the apparent inconsistency, offering support to Borghans et al.’s (2008) argument that economists should consider a multi‐domain approach to measuring risk attitudes. This paper uses laboratory methods to compare risk attitudes as measured by the Holt and Laury (2002) procedure under two different frames. We find that, as in Deck et al. (2009), one’s willingness to take financial risks (as measured by Weber et al. 2002) significantly affects behavior; however the effect is …

Perfect And Imperfect Real-Time Monitoring In A Minimum-Effort Game, Cary Deck, Nikos Nikiforakis

ESI Working Papers

This paper presents the results from a minimum-effort game in which individuals can observe the choices of others in real time. We find that under perfect monitoring almost all groups coordinate at the payoff-dominant equilibrium. However, when individuals can only observe the actions of their immediate neighbors in a circle network, monitoring improves neither coordination nor efficiency relative to a baseline treatment without real-time monitoring. We argue that the inefficiency of imperfect monitoring is due to information uncertainty, that is, uncertainty about the interpretation of the information available regarding the actions of others.

Price Increasing Competition? Experimental Evidence, Cary Deck, Jingping Gu

ESI Working Papers

Economic intuition suggests that increased competition generates lower prices. However, recent theoretical work shows that a monopolist may charge a lower price than a firm facing a competitor selling a differentiated product. The direction of the price change when competition is introduced is dependent upon the joint distribution of buyer values for the two products. We explore this relationship using controlled laboratory experiments. Our results indicate that the distribution of buyer values does affect prices in a manner consistent with the theoretical predictions, although price increasing competition is rare due in part to overly intense competition regardless of the distribution …

The Attack And Defense Of Weakest-Link Networks, Dan Kovenock, Brian Roberson, Roman M. Sheremeta

ESI Working Papers

This paper experimentally examines behavior in a two-player game of attack and defense of a weakest-link network of targets, in which the attacker‟s objective is to successfully attack at least one target and the defender‟s objective is diametrically opposed. We apply two benchmark contest success functions (CSFs): the auction CSF and the lottery CSF. Consistent with the theoretical prediction, under the auction CSF, attackers utilize a stochastic “guerilla warfare” strategy — in which a single random target is attacked — more than 80% of the time. Under the lottery CSF, attackers utilize the stochastic guerilla warfare strategy almost 45% of …

Durability, Re-Trading And Market Performance, John Dickhaut, Shengle Lin, David Porter, Vernon Smith

ESI Working Papers

Key differential structural characteristics of environments studied in previous market experiments have documented large divergences in their observed performance, particularly discrepancies in their convergence to expected equilibrium outcomes. We investigate why this should be so.