Following an initiative of the late Hans Zassenhaus in 1965, the Departments of Mathematics at The Ohio State University and Denison University organize conferences in combinatorics, group theory, and ring theory. Between May 18-21, 2000, the 25th conference of this series was held. Usually, there are twenty to thirty invited 20-minute talks in each of the three main areas. However, at the 2000 meeting, the combinatorics part of the conference was extended, to honor the 65th birthday of Professor Dijen Ray-Chaudhuri. This volulme is the proceedings of this extension. Most of the papers are in coding theory and design theory, reflecting the major interest of Professor Ray-Chaudhuri, but there are articles on association schemes, algebraic graph theory, combinatorial geometry, and network flows as well. There are four surveys and seventeen research articles, and all of these went through a thorough refereeing process. The volume is primarily recommended for researchers and graduate students interested in new developments in coding theory and design theory.

Thisseries is devoted to the publication of monographs, lecture resp. seminar notes, and other materials arising from programs of the OSU Mathemaical Research Institute. This includes proceedings of conferences or workshops held at the Institute, and other mathematical writings.

'It is written in clear English, without equations, and with plenty of charts to ground oneaEURO (TM)s understanding in the real world ... The authors make a compelling case that economists need to take their simplifying assumptions more seriously, to embrace statistical techniques that can track dynamic markets with time-varying parameters, and to always be aware of the importance of shifts in the underlying context.'Global Commodities Applied Research DigestEconomics Gone Astray is a collection of essays on critical topics in macroeconomics that frame the issues in terms of clearly stated assumptions, highlighting the errors often made by professional economists, and allowing readers to better analyze market behavior and the economic consequences of policy decisions.The book differs from textbook economics, as it tackles sophisticated topics without using mathematics or technical jargon. This makes the book highly accessible to all types of readers, from investors and investment professionals, to professors and their students.The book's style integrates a large quantity of clearly drawn charts which help anchor the readers' perceptions of the topics being examined, from inflation to taxes, to demographics.

'It is written in clear English, without equations, and with plenty of charts to ground oneaEURO (TM)s understanding in the real world ... The authors make a compelling case that economists need to take their simplifying assumptions more seriously, to embrace statistical techniques that can track dynamic markets with time-varying parameters, and to always be aware of the importance of shifts in the underlying context.'Global Commodities Applied Research DigestEconomics Gone Astray is a collection of essays on critical topics in macroeconomics that frame the issues in terms of clearly stated assumptions, highlighting the errors often made by professional economists, and allowing readers to better analyze market behavior and the economic consequences of policy decisions.The book differs from textbook economics, as it tackles sophisticated topics without using mathematics or technical jargon. This makes the book highly accessible to all types of readers, from investors and investment professionals, to professors and their students.The book's style integrates a large quantity of clearly drawn charts which help anchor the readers' perceptions of the topics being examined, from inflation to taxes, to demographics.