Lecture notes in statistics provides a format for the informal publication of monographs, conference proceedings, case studies, and similar material of theoretical or empirical importance. The timeliness of a manuscript is more iimportant than its form which may be unfinished or tentative. Thus, in some instances, proofs may be merely outlined and results presented which have recently been or will later be published elsewhere. If possible, a subject index should be included. Publication of the lecture notes is intended as a service to the international statistical community, in that a commercial publisher, Srinter Verlag, can provide efficient distribution of documents which would otherwise have a restricted readership.