Refine my results

The Finite Sample Performance of Estimators for Mediation Analysis Under Sequential Conditional Independence

Huber, Martin ; Lechner, Michael ; Mellace, Giovanni

In: Journal of Business & Economic Statistics, 2016, vol. 34, no. 1, p. 139-160

Using a comprehensive simulation study based on empirical data, this article investigates the finite sample properties of different classes of parametric and semiparametric stimators of (natural) direct and indirect causal effects used in mediation analysis under sequential conditional independence assumptions. The estimators are based on regression, inverse probability weighting, and...

Trophic cascades initiated by fungal plant endosymbionts impair reproductive performance of parasitoids in the second generation

Härri, Simone ; Krauss, Jochen ; Müller, Christine

In: Oecologia, 2008, vol. 157, no. 3, p. 399-407

Indirect trophic interactions with an invasive species affect phenotypic divergence in a top consumer

Hirsch, P. ; Eklöv, P. ; Svanbäck, R.

In: Oecologia, 2013, vol. 172, no. 1, p. 245-256

Impact of flower-dwelling crab spiders on plant-pollinator mutualisms

Brechbühl, Rolf ; Kropf, Christian ; Bacher, Sven

In: Basic and Applied Ecology, 2009///10.1016/j.baae.2009.07.001

Indirect effects in interactions occur when a species influences a third species by modifying the behaviour of a second one. It has been suggested that indirect effects of crab spiders (Thomisidae) on pollinator behaviour can cascade down the food web and negatively affect plant fitness. However, it is poorly understood how different pollinator groups react to crab spiders and, thus, when a...