A5071231803- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Social and Intergroup Psychology
- Evolutionary Game Theory and Cooperation
- Census and Population Estimation
- Experimental Behavioral Economics Studies
- Cultural Differences and Values
- Psychology of Moral and Emotional Judgment
- Culture, Economy, and Development Studies
- Gamma-ray bursts and supernovae
- Migration and Labor Dynamics
- Advanced Combinatorial Mathematics
- Language and cultural evolution
- Game Theory and Applications
- Urban, Neighborhood, and Segregation Studies
- School Choice and Performance
- Solar and Space Plasma Dynamics
- Game Theory and Voting Systems
- Atmospheric Ozone and Climate
- Regional Economics and Spatial Analysis
- Auction Theory and Applications
- semigroups and automata theory
Institute for Futures Studies
2021-2025
Mälardalen University
2016-2025
Stockholm University
2015-2024
RaySearch Laboratories (Sweden)
2024
Uppsala University
2012-2023
University of California, Davis
2012-2022
Stellenbosch University
2018-2022
Center for Economic and Policy Research
2022
National Bureau of Economic Research
2010-2020
University of Southern Denmark
2020
Context. In analyses of stellar spectra and colours, for the analysis integrated light from galaxies, a homogeneous grid model atmospheres late-type stars corresponding flux is needed.
It Pays to Be a Copy Cat Does it pay copy what others do? Rendell et al. (p. 208 ) elected Robert Axelrod's 1979 tournament in which strategies for playing the iterated prisoner's dilemma game were pitted against each other until an overall winner emerged—the tit-for-tat strategy. In 2008 tournament, 100 social learning designed cope with changing environment competed other; winning strategy involved sampling behaviors of players periodically, rather than exploring alone.
During the age of mass migration (1850–1913), one largest episodes in history, United States maintained a nearly open border, allowing study migrant decisions unhindered by entry restrictions. We estimate return to while accounting for selection comparing Norway-to-US migrants with their brothers who stayed Norway late nineteenth century. also compare fathers and nonmigrants wealth occupation. find that was relatively low (70 percent) from urban areas were negatively selected sending...
During the Age of Mass Migration (1850–1913), United States maintained an open border, absorbing 30 million European immigrants. Prior cross-sectional work finds that immigrants initially held lower-paid occupations than natives but converged over time. In newly assembled panel data, we show that, in fact, average immigrant did not face a substantial occupation-based earnings penalty upon first arrival and experienced occupational advancement at same rate as natives. Cross-sectional patterns...
view Abstract Citations (502) References (139) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Chemical Composition of Carbon Stars. I. Carbon, Nitrogen, and Oxygen in 30 Cool Stars the Galactic Disk Lambert, David L. ; Gustafsson, Bengt Eriksson, Kjell Hinkle, Kenneth H. compositions carbon stars are determined from high-resolution infrared spectra new model atmospheres. Elemental C, N, O abundances quite similar to those seen planetary nebulae...
The thermally-pulsing asymptotic giant branch (TP-AGB) experienced by low- and intermediate-mass stars is one of the most uncertain phases stellar evolution models need to be calibrated with aid observations. To this purpose, we couple high-quality observations resolved in Small Magellanic Cloud (SMC) detailed population synthesis simulations computed TRILEGAL code. strength our approach relies on spatially-resolved star formation history SMC, derived from deep near-infrared photometry VISTA...
Abstract Norm enforcement may be important for resolving conflicts and promoting cooperation. However, little is known about how preferred responses to norm violations vary across cultures domains. In a preregistered study of 57 countries (using convenience samples 22,863 students non-students), we measured perceptions the appropriateness various violation cooperative atypical social behaviors. Our findings highlight both cultural universals variation. We find universal negative relation...
The recent digitization of complete count census data is an extraordinary opportunity for social scientists to create large longitudinal datasets by linking individuals from one another or other sources the census. We evaluate different automated methods record linkage, performing a series comparisons across and against hand linking. have three main findings that lead us conclude perform well. First, number generate very low (less than 5 percent) false positive rates. trace out frontier...
Alan Rogers (1988) presented a game theory model of the evolution social learning, yielding paradoxical conclusion that learning does not increase fitness population. We expand on this model, allowing for imperfections in individual and as well incorporating “critical learning” strategy tries to solve an adaptive problem first by then if socially acquired behavior proves unsatisfactory. This always superior pure typically has higher than providing solution Rogers's paradox nonadaptive...
We report the discovery and high-resolution, high-S/N spectroscopic analysis of ultra-metal-poor red giant HE 0557-4840, which is third most heavy-element-deficient star currently known. Its atmospheric parameters are Teff = 4900 K, log g 2.2, [Fe/H] -4.75. This brings number stars with < -4.0 to three, 0557-4840 suggests that metallicity distribution function Galactic halo does not have a "gap" between -4.0, where several known, two metal-poor stars, at ~ -5.3. carbon rich ([C/Fe] +1.6),...
We present the elemental abundances of HE1327-2326, most iron-deficient star known, determined from a comprehensive analysis spectra obtained with Subaru Telescope High Dispersion Spectrograph.
Abstract A gender difference in risk preferences, with women being more averse to risky choices, is a robust experimental finding. Speculating on the sources of this difference, Croson and Gneezy recently pointed tendency for experience emotions strongly suggested that feeling about negative outcomes would lead greater risk-aversion. Here we test hypothesis an international survey 424 respondents from India 416 US where ask questions hypothetical lottery. In both countries find are stronger...
We present a new abundance analysis of HE 1327–2326, which is currently the most iron-poor star, based on observational data obtained with VLT Ultraviolet and Visual Echelle Spectrograph (UVES). correct one-dimensional (1D) LTE abundances for three-dimensional (3D) effects to provide an pattern that supersedes previous works should be used observationally test current models chemical yields first-generation supernovae (SNe). Apart from confirming 1D found in studies before accounting 3D...
Abstract In one conception of cultural evolution, the evolutionary success units that are transmitted from individual to is determined by forces selection. Here we argue it helpful distinguish between several distinct phases transmission process in which selection can operate, such as a choose-to-receive phase, an encode-and-retrieve and choose-to-transmit phase. focus on emotional urban legends, has previously been shown operate series experiments studied serial stories based legends...
Abstract A recent survey of inequality (Norton and Ariely, Perspectives on Psychological Science, 6 , 9–12) asked respondents to indicate what percent the nation’s total wealth is—and should be—controlled by richer poorer quintiles U.S. population. We show that such measures lead powerful anchoring effects account for otherwise remarkable findings reported perceiving, desiring, extremely low in wealth. same occur other domains, namely web page popularity school teacher salaries. introduce...
Using millions of historical census records and modern birth certificates, we document that immigrants assimilated into US society at similar rates in the past present. We measure cultural assimilation as giving their children less foreign names after spending more time United States, show erase about one-half naming gap with natives 20 years both historically today. Immigrants from poorer countries choose upon first arrival periods but are among fastest to shift toward native-sounding...
The nullification of slave wealth after the U.S. Civil War (1861-65) was one largest episodes compressions in history.We document that white Southern households holding more assets 1860 lost substantially by 1870, relative to had been equally wealthy before war.Yet, sons former slaveholders recovered comparable 1900, and grandsons surpassed their counterparts educational occupational attainment 1940.We find social networks facilitated this recovery, with marrying into other slaveholding...
Significance Cooperation is key to well-functioning groups and societies. Rather than addressing high-cost cooperation involving giving money or time effort, we examine social mindfulness—a form of interpersonal benevolence that requires basic perspective-taking aimed at leaving choice for others. Do societies differ in mindfulness, if so, does it matter? Here, find not only considerable variation across 31 nations regions but also an association between mindfulness countries’ performance on...