In 2019, the institutions that regulate citizen participation in Mexico City were substantially modified. This change included relevant modifications to the participatory budget (PB), such as an increase in the portion of income that the mayor's offices allocate to it and a change in the formula for allocating resources among the neighborhoods of each mayor's office. While some neighborhoods now receive much more resources, others remained almost unchanged and others receive even less. This paper analyzes the effect of this redistribution of resources both on citizen participation and on the competitiveness of the PB decision-making process