The paper “Is Islamic Banking Good for Growth?”; by Patrick Imam and Kangni Kpodar analyzes the relationship between the development of Islamic banking and economic growth in low- and middle-income countries. The focus note “Costs and Sustainability of Sharia-Compliant Microfinance Products” by Mayada El-Zoghbi and Kaylene Alvarez assesses the operational costs, overall cost structures and business models of Sharia-compliant financial service providers (FSPs). The paper “Islamic Microfinance in Yemen: Challenges and Opportunities;” by Ali Saleh Alshebami and Dr DM Khandare reviews the Islamic banking sector in Yemen from 1997 to 2013, identifying challenges to the implementation of Islamic banking practices in the country.