I study a market in which a profit-maximizing intermediary facilitates trade between buyers and sellers. The intermediary sets prices for buyers and sellers, and keeps the difference as her fee. Optimal prices increase when demand increases, i.e., shifts right. If a demand increase is due to an increase in the number of ex ante similar buyers, then the intermediary’s optimal percent fee decreas...

1. Call to Order President Joe Felsenstein called the council meeting to order at 9:20 AM, July 7, 2015. In attendance were President Joe Felsenstein, Past-president Brandon Gaut, President-Elect George Zhang, Secretary James McInerney, Treasurer Juliette de Meaux, Councilors Sandra Baldauf, David Liberles, Marta Wayne, Harmit Malik, Emma Teeling, Kateryna Marakova, Molecular Biology and Evolut...

Trait differences between invasive and native species are believed to be closely related to whether the former are successful. However, few studies have measured trait differences between invasive and native species directly under field conditions or during long term experiments. We examined the phenological pattern, plant height and biomass accumulation and allocation of Crofton weed (Eupatori...

We summarize in this paper some of the issues raised, opinions voiced, and ideas put forth at the eponymous panel discussion, for which we served as moderators. The panelists were Gary Dell, Jeri Jaeger, Stefanie Shattuck-Hufnagel and Joe Stemberger, whom we would like to thank for their contributions, and there was considerable audience participation as well. For practical reasons we do not at...

There is a trade-off between nitrogen (N) allocation to photosynthesis and to defence. Invasive species may reduce N allocation to defence because of the absence of natural enemies. Thus, I hypothesised that invasive species may allocate a higher fraction of total leaf N to photosynthesis and have higher light-saturated photosynthetic rate (P(max)) and photosynthetic N-use efficiency (PNUE) tha...