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Université de Fribourg

Better roads, better off? : Evidence on improving roads in Tanzania

Dumas, Christelle ; Játiva, Ximena

(Working Papers SES ; 518)

Spatial isolation is considered as one of the main determinants of poverty. Therefore, many transport investments are undertaken with a stated objective of poverty reduction. In our paper, we evaluate a Tanzanian program that rehabilitated 2500km of major roads between 2008 and 2013. We deal with endogenous placement issues with a household fixed-effect strategy combined with a propensity score...

Université de Fribourg

Les centres de loisirs lausannois : Des tensions entre 1971 et 1982

Rosselat, Fabrice

Mémoire de bachelor : Université de Fribourg, 2018.

L'attitude des adultes envers les jeunes oscille entre volonté d'encadrement et promotion de leur autonomie. L'histoire des centres de loisirs de Lausanne constitue un très bon exemple de cette ambivalence, car leur fonctionnement incarne différentes visions de la jeunesse et du rôles des autorités à leur égard. La recherche s'intéresse tout particulièrement aux débats qui ont marqué...

Université de Fribourg

Does long-term memory affect refreshing in verbal working memory?

Camos, Valerie ; Mora, Gérôme ; Oftinger, Anne-Laure ; Mariz Elsig, Stéphanie ; Schneider, Philippe ; Vergauwe, Evie

In: Journal of Experimental Psychology: Learning, Memory and Cognition, 2019, vol. 45, no. 9, p. 1664-1682

Attentional refreshing allows the maintenance of information in working memory and has received growing interest in recent years. However, it is still ill-defined and several proposals have been put forward to account for its functioning. Among them, some proposals suggest that refreshing relies on the retrieval of knowledge from semantic long-term memory. To examine such a proposal, the present...

Université de Fribourg

Low prevalence of lactase persistence in bronze age europe indicates ongoing strong selection over the last 3,000 years

Burger, Joachim ; Link, Vivian ; Blöcher, Jens ; Schulz, Anna ; Sell, Christian ; Pochon, Zoé ; Diekmann, Yoan ; Žegarac, Aleksandra ; Hofmanová, Zuzana ; Winkelbach, Laura ; Reyna-Blanco, Carlos S. ; Bieker, Vanessa ; Orschiedt, Jörg ; Brinker, Ute ; Scheu, Amelie ; Leuenberger, Christoph ; Bertino, Thomas S. ; Bollongino, Ruth ; Lidke, Gundula ; Stefanović, Sofija ; Jantzen, Detlef ; Kaiser, Elke ; Terberger, Thomas ; Thomas, Mark G. ; Veeramah, Krishna R. ; Wegmann, Daniel

In: Current Biology, 2020, p. -

Lactase persistence (LP), the continued expression of lactase into adulthood, is the most strongly selected single gene trait over the last 10,000 years in multiple human populations. It has been posited that the primary allele causing LP among Eurasians, rs4988235-A [1], only rose to appreciable frequencies during the Bronze and Iron Ages [2, 3], long after humans started consuming milk from...

Université de Fribourg

Superconducting optical response of photodoped Mott insulators

Li, J. ; Golez, D. ; Werner, Philipp ; Eckstein, M.

In: Modern Physics Letters B, 2020, vol. 34, no. 19n20, p. 2040054

Ultrafast laser pulses can redistribute charges in Mott insulators on extremely short time scales, leading to the fast generation of photocarriers. It has recently been demonstrated that these photocarriers can form a novel η-paired condensate at low temperatures, featuring a staggered superconducting pairing field. In this conference paper, we discuss the origin of the η-paired hidden...

Université de Fribourg

Entropy and specific heat of the infinite-dimensional three-orbital Hubbard model

Yue, Changming ; Werner, Philipp

In: Physical Review B, 2020, vol. 102, no. 8, p. 085102

The Hund's coupling in multiorbital Hubbard systems induces spin freezing and associated Hund metal behavior. Using dynamical mean-field theory, we explore the effect of local moment formation, spin, and charge excitations on the entropy and specific heat of the three-orbital model. For fillings 2≲n<3 and low temperature, we demonstrate a substantial enhancement of the entropy in the...

Université de Fribourg

Capitalising on covariates in cluster-randomised experiments

Vanhove, Jan

In: PyArXiv, 2020, p. 1-45

In cluster-randomised experiments, participants are randomly assigned to the conditions not on an individual basis but in entire groups. For instance, all pupils in a class are assigned to the same condition. This article reports on a series of simulations that were run to determine (1) how the clusters (e.g., classes) in such experiments should be assigned to the conditions if a relevant...