Building on the success of the first edition, this thoroughly revised and expanded edition explores (1) areas of general agreement from previous research; (2) areas of conflicting results and unexplored questions; (3) the relative roles of theory, data availability and empirical analysis in explaining gaps in our knowledge; and (4) what must be done to improve our knowledge and extend the literature. Selected original chapters addressing especially challenging topics include the value of risk management to nonprofit decision-making; nonprofit wages theory and evidence; the valuation of volunteer labor; property tax exemption for nonprofits; when is competition good for the third sector; and product diversification and social enterprise; international perspectives; the application of experimental research and the macroeconomic effects of the nonprofit sector.