Statistical inference based on stepwise model selection is applied regularly in ecological, evolutionary, and behavioral research. In addition to fundamental shortcomings with regard to finding the "best" model, stepwise procedures are known to suffer from a multiple-testing problem, yet the method is still widely used. As an illustration of this problem, we present results of a simulation stud...

A model which is a mixture of the model of infinite alleles and the Ohta-Kimura model of stepwise mutation has been proposed for the study of eletcrophoretic variants in natural populations. Mutations which alter the mobility of a protein are divided into two classes: stepwise mutations and nonstepwise mutations. It is assumed that stepwise mutations follow the Ohta-Kimura model while nonstepwi...

in recent decades, necessity to protect environment has been a serious concern for all people and international communities. in appropriate development of human economic activities, subsistence dependence of the growing world population on nature decreases the natural diversity of ecosystems and habitats day by day and provides additional constraints for life and survival of wildlife. as a resu...

We consider voluntary disclosure of nonproprietary information. Established research knows two classes of models. Some authors assume that the manager can be fined prohibitively high if she lies. Others assume that no punishment can be imposed. We generalize and unify those approaches and investigate an intermediate class of models. Our main result is that a clustering of reports may occur. Fir...

A procedure, called α-procedure, for the efficient automatic classification of multivariate data is described. It is based on a geometric representation of two learning classes in a proper multi-dimensional rectifying feature space and the stepwise construction of a separating hyperplane in that space. The dimension of the space, i.e. the number of features that is necessary for a successful cl...

In two perception experiments on read German, we investigate how far different accent positions and accent types are related to degrees of perceived givenness both in sentences in isolation and in context. Results reveal a stepwise decrease in the degree of perceived givenness from deaccentuation and prenuclear accents through low and early peak nuclear accents to high and rising nuclear accent...