Dr. Piotr Idczak and dr. Ida Musiałkowska participated in  the 8^th INTERNATIONAL DAYS OF STATISTICS AND ECONOMICS" that took place in Prague Pradze between 11th and 13th of September 2014. During the conference both authors presented the paper "Leadership and regional and urban development. The case of the city of Poznań (Poland)." that includes results of the research project co-financed by the Visegrad Fund.