The articles in this volume are selected from the contributions to two international conferences. Authors and teams tackle general economic approaches and developments with respect to new concepts for the production possibility frontier, the connection of development and exports diversification and improvements to the business process. Other contributors address economic sustainability with respect to an institutional path to sustainable growth, available financial instruments, behavioral models of economic expectations, solutions for waste treatment as well as to technological aspects related to security, privacy and IT governance. Finally, a third group of authors discusses health policy in the EU and postsecondary education in Bulgaria as aspects of public welfare.