The Mayor’s Office of Management and Budget (OMB) is the City of New York’s chief financial agency. OMB's staff of more than 400 analysts assemble and oversee both the expense budget. This includes overseeing the budgets of approximately 90 City agencies and entities. In addition, OMB plays many other important roles. Among these, the agency is charged with evaluating the efficiency and cost-effectiveness of City services and proposals. OMB's economists provide vital information to government officials on the local, United States and world economies. OMB also helps implement the City's borrowing and bond programs and conducts legal reviews of capital projects for financing with bond proceeds.