Most broadly, all participatory budgeting schemes allow citizens to deliberate with the goal of creating either a concrete financial plan (a budget), or a recommendation to elected representatives. In the Porto Alegre model, the structure of the scheme gives sub-jurisdictions (neighborhoods) authority over the larger political jurisdiction (the city) of which they are part. Neighborhood budget committees, for example, have authority to determine the citywide budget, not just the allocation of resources for their particular neighborhood. There is, therefore, a need for mediating institutions to facilitate the aggregation of budget preferences expressed by sub-jurisdictions.