According to Mary Douglas, blame is systematically used in the micro politics of institutions, with three latent functions: explaining disasters; justifying allegiances, and stabilizing existing institutional regimes. Within a politically stable regime, blame tends to be asserted on the weak or unlucky one, but in a less stable regime, blame shifting may involve a battle between rival factions. Douglas was interested in how blame stabilizes existing power structures within institutions or social groups. She devised a two-dimensional typology of institutions, the first attribute being named "group", which is the strength of boundaries and social cohesion, the second "grid", the degree and strength of the hierarchy. According to Douglas, blame will fall on different entities depending on the institutional type. For markets, blame is used in power struggles between potential leaders. In bureaucracies, blame tends to flow downwards and is attributed to a failure to follow rules. In a clan, blame is asserted on outsiders or involves allegations of treachery, to suppress dissidence and strengthen the group's ties. In the 4th type, isolation, the individuals are facing the competitive pressures of the marketplace alone, in other words there is a condition of fragmentation with a loss of social cohesion, potentially leading to feelings of powerlessness and fatalism, and this type was renamed by various other authors into "donkey jobs". It is suggested that the progressive changes in managerial practices in healthcare is leading to an increase in donkey jobs.