This extended abstract concerns the FP7-project Spencer. As part of the Spencer project, a demonstrator robot will be developed which provide services to passengers at a major European airport. Example services include (1) guiding transfer passengers from their arrival gate to the so-called Schengen barrier, and (2) assisting in the transfer process by printing boarding passes. The goal of the ...

This paper analyzes export subsidies (price incentives) and export quotas (quantity controls) in the Brander-Spencer (1985) model when policy makers have limited information on demand and cost structures. We examine necessary or sufficient information for policy makers to determine the right policies. It is crucial that they know the elasticity values of the slope of the inverse demand curve an...

Maerl grounds are formed from loose-lying, normally non-geniculated, coralline red algae (Corallinaceae). Such grounds are found in areas characterized primarily by high water movements in the photic zone. Maerl grounds form shallow marine biotopes of high biodiversity, analogous to kelp forests and sea grass beds, all of which are habitats created by marine phototrophs (Birkett et al., 1998; B...

Motivated in part by large and persistent gender gaps in labor market outcomes (e.g., Claudia Goldin 1994; Joseph G. Altonji and Rebecca M. Blank 1998), a large body of experimental research has been devoted to understanding gender differences in behavior and responses to stimuli. An influential finding in experimental psychology is the presence of stereotype threat: making gender salient induc...

We propose a new point of view of the Spencer cohomology appearing in the formal theory of differential equations based on a dual approach via comodules. It allows us to relate the Spencer cohomology with standard constructions in homological algebra and, in particular, to express it as a Cotor. We discuss concrete methods for its construction based on homological perturbation theory. Appears i...