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An option space approach to wood use:Providing structural timber for buildings while safeguarding forest integrity
No full textWood use is crucial for climate-change mitigation, but strategies range from increasing harvest to conserving forests. To reconcile contradictions, we conceptualize an option space that considers both social and ecological thresholds. We couple the material flow model RECC and the forest model CRAFT to quantify the option space for wood use in the global building sector and current forest areas from 2020 to 2050. We juxtapose four demand scenarios with four supply scenarios that meet material and ecosystem service thresholds, respectively. In 12 of the 16 resulting scenario combinations, supply exceeds demand. They differ in regional self-sufficiency (6–9 out of ten world regions), average primary wood availability beyond structural timber use (0.2–1.4 GtCyr−1), and overall climate impacts (2.0–8.0 GtCO2eqyr−1). Substantially increasing wood intensity in buildings within ecological limits is only feasible in a low floorspace scenario with increasing circularity, emphasizing the need for nuance in claims regarding the sustainability of wood use
Drivers of cooperation in social dilemmas on higher-order networks
No full textUnderstanding cooperation in social dilemmas requires models that capture the complexity of real-world interactions. While network frameworks have provided valuable insights to model the evolution of cooperation, they are unable to encode group interactions properly. Here, we introduce a general higher-order networks framework for multi-player games on structured populations. Our model considers multi-dimensional strategies, based on the observation that social behaviours are affected by the size of the group interaction. We investigate the dynamical and structural coupling between different orders of interactions, revealing the crucial role of nested multi-level interactions and showing how such features can enhance cooperation beyond the limit of traditional models with uni-dimensional strategies. Our work identifies the key drivers promoting cooperative behaviour commonly observed in real-world group social dilemmas
Cultural Homophily and Collaboration in Superstar Teams
No full textOne may reasonably think that cultural homophily, defined as the tendency to associate with others of similar culture, affects collaboration in multinational teams in general but not in superstar teams of professionals at the top of their industry. The analysis of an exhaustive data set on the passes made by professional European football players in the top five men’s leagues reveals that on the contrary, cultural homophily is persistent, pervasive, and consequential, even in superstar multinational teams of very-high-skill individuals with clear common objectives and aligned incentives who are involved in interactive tasks that are well defined and not particularly culture intensive
Why do migrants stay unexpectedly? Misperceptions and implications for integration
No full textEmpirical evidence suggests that the majority of immigrants who initially planned a temporary stay end up staying permanently in the host country. Since beliefs about the duration of stay are a strong determinant of integration, many long-term migrants may end up less than optimally integrated. We theoretically model migrants with potential misperceptions about their future utility and wage prospects in the host country relative to their country of origin. We describe conditions under which these misperceptions generate, and conditions on observables that identify, unexpected staying. These conditions involve pessimism about the endogenous long-term wage for which migrants are indifferent between staying and leaving: either they overestimate the probability of earning less than this indifference wage, or they underestimate their utility in the destination country when earning this wage. Using the German Socio-Economic Panel (SOEP), we find that higher levels of pessimism about utility and wages at arrival are associated with staying in the long-term in Germany despite having initially predicted a temporary stay
