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341.
Urban Ecosystems - Rapid urbanization is emerging as one of the leading threats to the biodiversity globally. But is especially a cause of concern for tropical countries which are urbanizing much... 相似文献
342.
Pierre‐Andr Chiappori Monica Paiella 《Journal of the European Economic Association》2011,9(6):1021-1052
Most classical tests of constant relative risk aversion (CRRA) based on individual portfolio composition use cross‐sectional data. Such tests must assume that the distributions of wealth and preferences are independent. We use panel data to analyze how individuals’ portfolio allocation between risky and riskless assets varies in response to changes in total financial wealth. We find the elasticity of the risky asset share to wealth to be small and statistically insignificant, supporting the CRRA assumption; this finding is robust when the sample is restricted to households experiencing large income variations. In addition, we find a small but significant negative correlation between wealth and risk aversion. Various extensions are discussed. 相似文献
343.
Savaş Karataş Katharina Eckstein Peter Noack Monica Rubini Elisabetta Crocetti 《Journal of research on adolescence》2023,33(4):1335-1349
This study aims to tackle positive and negative intergroup contact in school and out-of-school contexts to test whether a spillover effect (i.e., the extent to which experiences that individuals have in one context spill over into another) applies to intergroup contact. Participants were 984 adolescents (Mage = 14.66; 62.7% female; 24.8% ethnic minority). Results indicated that positive contact in school was related over time to higher positive contact in out-of-school contexts and vice versa (i.e., valence consistent spillover effect). Positive contact in school was linked over time to lower negative contact in out-of-school contexts (i.e., valence inconsistent spillover effect). Overall, this study provides novel insights into the transmission of adolescents' intergroup contact across socialization contexts by emphasizing the leading role of positive contact in schools. 相似文献
344.