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  • 1. Almenberg, Johan
    et al.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Exponential growth bias and financial literacy2012Ingår i: Applied Economics Letters, ISSN 1350-4851, E-ISSN 1466-4291, Vol. 19, nr 17, s. 1693-1696Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The tendency to underestimate the future value of a variable growing at a constant rate, an example of exponential growth bias, has been linked to household financial decision-making. We show that exponential growth bias and standard measures of financial literacy are negatively correlated in a representative sample of Swedish adults. Since financial literacy is linked to household decision-making, our results indicate that examining the relationship between exponential growth bias and household finance without adequate controls for financial literacy may generate biased results.

  • 2. Dreber, A.
    et al.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Gränsmark, Patrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Little, A. C.
    Facial masculinity predicts risk and time preferences in expert chess players2013Ingår i: Applied Economics Letters, ISSN 1350-4851, E-ISSN 1466-4291, Vol. 20, nr 16, s. 1477-1480Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study, we examine the relationship between risk-taking, impatience and facial masculinity in expert chess players. We combine a large panel data set from high-level chess games with measures of both risk-taking and impatience in chess with facial masculinity, a proxy for testosterone exposure in puberty. We find that male players with high pubertal testosterone exposure are more impatient by playing shorter chess games. For female players, we find that facial masculinity is negatively correlated with risk-taking.

  • 3. Dreber, Anna
    et al.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Gränsmark, Patrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Beauty queens and battling knights: Risk taking and attractiveness in chess2013Ingår i: Journal of Economic Behavior and Organization, ISSN 0167-2681, E-ISSN 1879-1751, Vol. 90, nr June, s. 1-18Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We explore the relationship between attractiveness and risk taking in chess. We use a large international panel dataset on high-level chess competitions which includes a control for the players’ skill in chess. This data is combined with results from a survey on an online labor market where participants were asked to rate the photos of 626 expert chess players according to attractiveness. Our results suggest that male chess players choose significantly riskier strategies when playing against an attractive female opponent, even though this does not improve their performance. Women's strategies are not affected by the attractiveness of the opponent.

  • 4. Franke, Andreas G.
    et al.
    Gränsmark, Patrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Agricola, Alexandra
    Schühle, Kai
    Ronnmel, Thilo
    Sebastian, Alexandra
    Balló, Harald E.
    Gorbulev, Stanislav
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Frank, Björn
    Ruckes, Christian
    Tüscher, Oliver
    Lieb, Klaus
    Methylphenidate, modafinil, and caffeine for cognitive enhancement in chess: A double-blind, randomised controlled trial2017Ingår i: European Neuropsychopharmacology, ISSN 0924-977X, E-ISSN 1873-7862, Vol. 27, nr 3, s. 248-260Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Stimulants and caffeine have been proposed for cognitive enhancement by healthy subjects. This study investigated whether performance in chess - a competitive mind game requiring highly complex cognitive skills - can be enhanced by methylphenidate, modafinil or caffeine. In a phase IV, randomized, double-blind, placebo-controlled trial, 39 male chess players received 2 x 200 mg modafinil, 2 x 20 mg methylphenidate, and 2 x 200 mg caffeine or placebo in a 4 x 4 crossover design. They played twenty 15-minute games during two sessions against a chess program (Fritz 12; adapted to players' strength) and completed several neuropsychological tests. Marked substance effects were observed since all three substances significantly increased average reflection time per game compared to placebo resulting in a significantly increased number of games lost on time with all three treatments. Treatment effects on chess performance were not seen if all games (n=3059) were analysed. Only when controlling for game duration as well as when excluding those games lost on time, both modafinil and methylphenidate enhanced chess performance as demonstrated by significantly higher scores in the remaining 2876 games compared to placebo. In conjunction with results from neuropsychological testing we conclude that modifying effects of stimulants on complex cognitive tasks may in particular result from more reflective decision making processes. When not under time pressure, such effects may result in enhanced performance. Yet, under time constraints more reflective decision making may not improve or even have detrimental effects on complex task performance.

  • 5.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    A Comparative Study of Net Transfers for Different Immigrant Groups: Evidence from Germany2014Ingår i: International migration (Geneva. Print), ISSN 0020-7985, E-ISSN 1468-2435, Vol. 52, nr 4, s. 175-208Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In the wake of immigration to Western welfare states, certain aspects, such as the financial cost of providing social welfare, have become a subject of debate. The net amount of costs and tax payments, sometimes referred to as net transfers, has been used as a measure for evaluating the sustainability of welfare state systems. The present study analyses determinants of the volume of net transfers in Germany in 2002 with reference to immigrants from Poland, Turkey, former Yugoslavia, Lebanon and Iran. The study focuses on the differences and similarities between their outcomes. In line with previous research, the results below suggest that employment situation and family composition explain a large part of the differences in net transfers. One outcome that has not previously been adequately addressed, however, is that the legal immigration status granted on arrival in Germany is of considerable importance.

  • 6.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Determination of Net Transfers for Immigrants in Germany2007Rapport (Övrigt vetenskapligt)
  • 7.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Does immigration induce native flight from public schools?2013Ingår i: The annals of regional science, ISSN 0570-1864, E-ISSN 1432-0592, Vol. 50, nr 2, s. 645-666Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    For more than a century, parents in Denmark could enroll their children into privately operated free schools. Results from this study indicate an increase in native Danes' propensity to enroll their children in free schools as the share of children with immigrant background becomes larger in their municipality of residence. The effect is most pronounced in small, and medium-sized municipalities, while it seems absent in larger municipalities. The study explores changes in the immigrant population in Danish municipalities 1992-2004, a period marked by a substantial influx of refugees, where a state-sponsored placement policy restricted their initial choice of residence.

  • 8.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Stödet för välfärdsstaten är starkt2008Övrigt (Övrig (populärvetenskap, debatt, mm))
  • 9.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    The Impact of Immigration on the Size of Government: Empirical Evidence from Danish Municipalities2011Ingår i: Scandinavian Journal of Economics, ISSN 0347-0520, E-ISSN 1467-9442, Vol. 113, nr 1, s. 74-92Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Several studies have reported a negative relationship between ethnic heterogeneity and the size of the public sector. One problem with this literature is that ethnic composition is hardly exogenous, which obstructs attempts to reveal causal mechanisms. This paper explores the impact of changes in ethnic heterogeneity in Danish municipalities from 1995 through 2001, a period marked by an unprecedented influx of refugees. A state-sponsored placement policy restricted their choice of residence and required local governments to accept them as citizens. The analysis of the impact of this influx has not revealed any support for the claim of a decline in public sector size.

  • 10.
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Using 'Shares' vs. 'Log of Shares' in Fixed-Effect Estimations2011Ingår i: Journal of Economics and Econometrics, ISSN ISSN 2032-9652 E-ISSN 2032-9660, Vol. 54, nr 1, s. 1-7Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper looks at potential implications emerging from including "shares" as a control variable in fixed effect estimations. By shares we refer to the ratio of a sum of units over another, such as the share of immigrants in a city or school. As will be shown in this paper, alogarithmic transformation of shares has methodological merits compared to the use of shares defined as mere ratios.

  • 11.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Gränsmark, Patrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Strategic behavior across gender: A comparison of female and male expert chess players2010Ingår i: Labour Economics, ISSN 0927-5371, E-ISSN 1879-1034, Vol. 17, nr 5, s. 766-775Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper aims to measure differences in risk behavior among expert chess players. The study employs a panel data set on international chess with 1.4 million games recorded over a period of 11 years. The structure of the data set allows us to use individual fixed-effect estimations to control for aspects such as innate ability as well as other characteristics of the players. Most notably, the data contains an objective measure of individual playing strength, the so-called Elo rating. In line with previous research, we find that women are more risk-averse than men. A novel finding is that men choose more aggressive strategies when playing against female opponents even though such strategies reduce their winning probability.

     

  • 12.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Schultz-Nielsen, Marie Louise
    Wadensjö, Eskil
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Indvandringens betydning for de offentlige finanser i Danmark2011Rapport (Refereegranskat)
  • 13.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Schultz-Nielsen, Marie Louise
    Wadensjö, Eskil
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    The significance of immigration for public finances in Denmark2011Rapport (Refereegranskat)
    Abstract [en]

    This paper studies the economic consequences of immigration for public finances in Denmark. Using new figures for the period 2004-2008, net transfers are calculated, and presented as an extension to the figures that already existed for the period 1991-2001. The net transfers are calculated from a marginal perspective, which means that the included public expenditures and incomes can be traced to each individual person in our sample. The study is therefore suited for analyzing the economic consequences if more/less people immigrate. A consistent pattern to emerge throughout is that net transfers from Western first- and second-generation immigrants to state funds are positive, while those from non-Western first- and second-generation immigrants are negative. The new calculations show that net transfers from non-Western first- and second-generation immigrants fell from DKK -12.8 billion in 2004 to DKK -9.1 billion in 2008, largely due to the improved employment situation in Denmark. The results also show, however, that the composition chosen of the group of non-Western immigrants has a significant effect on the calculation of net transfers, in that these transfers are reduced to DKK -2.2 billion if refugees are excluded from this group.

  • 14.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Wadensjö, Eskil
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Immigrants from the New EU Member States and the Swedish Welfare State2008Rapport (Övrigt vetenskapligt)
  • 15.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Wadensjö, Eskil
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Is immigration challenging the economic sustainability of the Nordic welfare model?2011Ingår i: Changing social equality. The Nordic welfare model in the 21st century / [ed] Jon Kvist, Johan Fritzell, Björn Hvinden, Olli Kangas, Bristol: The Policy Press , 2011, s. 187-199Kapitel i bok, del av antologi (Refereegranskat)
  • 16.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Wadensjö, Eskil
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Post-enlargement migration and adjustment in a receiving country: the case of Sweden2016Ingår i: Labor migration, EU enlargement, and the great recession / [ed] Martin Kahanec, Klaus F. Zimmermann, Berlin: Springer Berlin/Heidelberg, 2016, s. 123-138Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Sweden’s immigration policy has changed drastically on several occasions over time. Immigration policy was very liberal from the 1860s until WW1, with no requirements regarding passports, visas or work permits, although international migration mainly involved emigration during this period in the context of Sweden, with wages lower than in neighboring countries. The policy changed in 1914 after the start of WW1, and the controls became gradually more stringent during the war, with a work permit compulsory and difficult to attain for those who wanted to move to Sweden for work. While the immigration regulation remained after the war, the requirements for those coming from other Nordic countries were made slightly less stringent. The work permit requirement in the interwar-period was motivated by the high unemployment rate, based upon the notion that jobs should be reserved for natives.

  • 17.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Wadensjö, Eskil
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Post-Enlargement Migration and Labour Market Impact in Sweden2009Ingår i: EU Labor Markets After Post-Enlargement Migration, Berlin: Springer , 2009, s. 163-179Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 18.
    Gerdes, Christer
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Wadensjö, Eskil
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Utvidgningen av EU och arbetskraftsinvandringen: de svenska erfarenheterna2014Ingår i: Multiethnica. Meddelande från Centrum för multietnisk forskning, Uppsala universitet, ISSN 0284-396X, nr 35, s. 3-8Artikel i tidskrift (Övrigt vetenskapligt)
  • 19.
    Gränsmark, Patrik
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Dreber, Anna
    Gerdes, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutet för social forskning (SOFI).
    Beaty Queens and batling Knights : Riks Taking and Attractiveness in ChessManuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    In this study we explore the relationship between attractiveness and risk taking in chess. We examine whether people use riskier strategies when playing with attractive opponents, whether this affects performance, and whether there are gender differences in the reaction to an attractive opponent. We use a large international panel dataset on chess competitions which includes a control for the players’ skill in chess. We combine this data with results from a large survey on an online labor market where participants were asked to rate the photos of 626 expert chess players. Our results suggest that male chess players choose significantly riskier strategies when playing against an attractive female opponent, although this does not improve their performance. Women’s strategies are not affected by the attractiveness of the opponent.

1 - 19 av 19
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