Socialist economists Pranab Bardhan and John Roemer criticise Nordic-style social democracy for its questionable effectiveness in promoting relative egalitarianism as well as its sustainability. They point out that Nordic social democracy requires a strong labour movement to sustain the heavy redistribution required, arguing that it is idealistic to think similar levels of redistribution can be accomplished in countries with weaker labour movements. They note that even in the Scandinavian countries social democracy has been in decline since the weakening of the labour movement in the early 1990s, arguing that the sustainability of social democracy is limited. Roemer and Bardham argue that establishing a market socialist economy by changing enterprise ownership would be more effective than social democratic redistribution at promoting egalitarian outcomes, particularly in countries with weak labour movements.