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Full-Text Articles in Social and Behavioral Sciences
The Multiple Dimensions Of Male Social Status In An Amazonian Society, Christopher Von Rueden, Michael Gurven, Hillard Kaplan
The Multiple Dimensions Of Male Social Status In An Amazonian Society, Christopher Von Rueden, Michael Gurven, Hillard Kaplan
ESI Publications
"In all human societies, individuals differ in social status depending upon their age and personal ability (Sahlins, 1958; Service, 1971). In laboratory-based small group studies, status hierarchies emerge spontaneously (Bass, 1954; Campbell et al., 2002; Kalma, 1991). Even among “egalitarian” foragers, who are characterized by widespread resource sharing (Kaplan & Gurven, 2005; Winterhalder, 1986) and some degree of status-leveling (Cashdan, 1980), certain individuals consume more resources, get the best pick of mates, and take a more central role in group decision-making (Boehm, 1999; Trigger, 1985; Wiessner, 1996). Whether implicit or overt, classification by social status is a human universal. While …
Aging And Inflammation In Two Epidemiological Worlds, Michael Gurven, Hillard Kaplan, Jeffrey Winking, Caleb Finch, Eileen M. Crimmins
Aging And Inflammation In Two Epidemiological Worlds, Michael Gurven, Hillard Kaplan, Jeffrey Winking, Caleb Finch, Eileen M. Crimmins
ESI Publications
Humans evolved in a world with high levels of infection resulting in high mortality across the life span and few survivors to advanced ages. Under such conditions, a strong acute-phase inflammatory response was required for survival; however, inflammatory responses can also promote chronic diseases of aging. We hypothesize that global historical increases in life span at older ages are partly explained by reduced lifetime exposure to infection and subsequent inflammation. To begin a test of this hypothesis, we compare C-reactive protein (CRP); levels in two populations with different epidemiological environments: the Tsimane of Bolivia and persons in the United States. …
Another Example Of A Credit System That Coexists With Money, Gabriele Camera, Yiting Li
Another Example Of A Credit System That Coexists With Money, Gabriele Camera, Yiting Li
Economics Faculty Articles and Research
We study an economy in which exchange occurs pairwise, there is no commitment, and anonymous agents choose between random monetary trade or deterministic credit trade. To accomplish the latter, agents can exploit a costly technology that allows limited recordkeeping and enforcement. An equilibrium with money and credit is shown to exist if the cost of using the technology is sufficiently small. Anonymity, record-keeping and enforcement limitations also permit some incidence of default, in equilibrium.
High Stakes Behavior With Low Payoffs: Inducing Preferences With Holt-Laury Gambles, John Dickhaut, Daniel Houser, Jason A. Aimone, Dorina Tila, Cathleen Johnson
High Stakes Behavior With Low Payoffs: Inducing Preferences With Holt-Laury Gambles, John Dickhaut, Daniel Houser, Jason A. Aimone, Dorina Tila, Cathleen Johnson
ESI Working Papers
A continuing goal of experiments is to understand risky decisions when the decisions are important. Often a decision’s importance is related to the magnitude of the associated monetary stake. Khaneman and Tversky (1979) argue that risky decisions in high stakes environments can be informed using questionnaires with hypothetical choices (since subjects have no incentive to answer questions falsely.) However, results reported by Holt and Laury (2002, henceforth HL), as well as replications by Harrison (2005) suggest that decisions in “high” monetary payoff environments are not well-predicted by questionnaire responses. Thus, a potential implication of the HL results is that studying …
Can Manipulators Mislead Prediction Market Observers?, Ryan Oprea, David Porter, Chris Hibbert, Robin Hanson, Dorina Tila
Can Manipulators Mislead Prediction Market Observers?, Ryan Oprea, David Porter, Chris Hibbert, Robin Hanson, Dorina Tila
ESI Working Papers
We study experimental markets where privately informed traders exchange simple assets, and where uninformed third parties are asked to forecast the values of these assets, guided only by market prices. Although prices only partially aggregate information, they signicantly improve the forecasts of third parties. In a second treatment, a portion of traders are given preferences over the forecasts made by observers. Although we find evidence that these traders attempt to manipulate prices in order to influence the beliefs of observers, we find no evidence that observers make less accurate forecasts as a result.
Generating Ambiguity In The Laboratory, Jack Douglas Stecher, Timothy W. Shields, John Dickhaut
Generating Ambiguity In The Laboratory, Jack Douglas Stecher, Timothy W. Shields, John Dickhaut
ESI Working Papers
This article develops a method for drawing samples from which it is impossible to infer any quantile or moment of the underlying distribution. The method provides researchers with a way to give subjects the experience of ambiguity. In any experiment, learning the distribution from experience is impossible for the subjects, essentially because it is impossible for the experimenter. We describe our method mathematically, illustrate it in simulations, and then test it in a laboratory experiment. Our technique does not withhold sampling information, does not assume that the subject is incapable of making statistical inferences, is replicable across experiments, and requires …