Over the past 20 years, there has been a dramatic expansion, especially in Europe and the USA, in the number of firms that are owned and controlled by their workforces. Although in some of these firms workers have partial ownership but little control, the number of firms that are both worker-owned and worker-controlled has been growing at an increasing rate. Furthermore, these producer co-operatives are enjoying a degree of success in terms of profitability and survival that far surpasses expectations based on earlier experiments.There has also been a rapid expansion of intellectual interest in the nature of and potential for worker-owned and worker-controlled firms. Increasing numbers of academics specialize in the study of producer co-operatives. These scholars are found principally in the disciplines of economics, sociology, political science, labour relations, and management. New journals have sprung up dedicated to this field, and articles dealing with the topic appear increasingly in the prestigious journals of specialized social science disciplines. Several conferences are held each year, and even at general professional social science conferences, greater numbers of sessions are being devoted to the topic. Associations and consulting firms have sprung up to provide expertise to those wishing to create producer co-operatives or convert to them from traditional capitalist firms.There has also been a renewal of interest in worker participation within labour unions and worker organizations. The belief that labour must maintain an adversarial role towards capital and management appears to be giving way, albeit slowly, to a search for strategies that will reduce capital-labour conflict. These strategies have spanned the spectrum from putting workers on corporate boards of directors to full worker ownership and control.Even governments in Western capitalist countries have taken actions towards increasing worker participation. In a number of countries, legislation has been passed requiring worker representation on the boards of directors of large firms. State aid has been provided for establishing producer co-operatives. In the USA, significant tax advantages are offered to firms that grant workers a degree of ownership. Indeed, there is surprising support within many traditional political parties. In England, for instance, all major political parties are on record as favouring greater worker participation.