Present addresses John N. Ferguson, Institute for Genomic Biology, University of Illinois at UrbanaChampaign, Urbana, IL, USA. Matt Humphry, British American Tobacco, Cambridge Science Park, Cambridge, UK. Abstract The ability of plants to acquire and use water is critical in determining life-history traits such as growth, flowering, and allocation of biomass into reproduction. In this context,...

In search for novel T-cell immunogens involved in protection against invasive meningococcal disease, we screened fractionated proteins of Neisseria meningitidis (strain SD, B:15:P1.16) by using peripheral blood mononuclear cells (PBMCs) and specific T-cell lines obtained from normal individuals and patients convalescing from N. meningitidis infection. Proteins of iron-depleted meningococci prod...

We develop semiparametric and instrumental-variables approaches to self-selection problems in comparisons of wage inequality between educational groups. We propose new estimators to identify the causal effect of college education on scale parameters of wage distributions, using symmetry conditions on the joint distribution of outcome and selection errors, along with kernel weighting schemes. A ...

This paper is an attempt to provide evidence on two questions: Why do companies sponsor art events, and where exactly does the money go? We analyse data collected on the revenue structure of cultural institutions in Berlin and Hamburg. This data set not only tells us where the money goes, it also allows us to draw conclusions with respect to donors' motives. We regress sponsorships received on ...