this e-book is derived from papers presented at YIRCoF'09 (Yeditepe International Research Conference on Foresight) in Istanbul between September 4 – 6, 2009. Papers published in this e-book are designed to communicate on challenging problems related to methodological issues in national, regional, sectoral and corporate foresight studies. The papers also aim to provide an invaluable opportunity for drawing upon the experience gained from foresight exercises via new research methodologies.