PRESIDENT Bola Tinubu announced an overhaul of Nigeria's economic governance intended to ease financial hardship and boost productivity, establishing a multi-layered framework to bolster coordination, planning and implementation. Tinubu, who took office last year, inherited an economy struggling with record debt, high unemployment, low oil output, and power shortages that have crimped growth. But reforms he has implemented since then, chiefly ending a costly petrol subsidy and twice devaluing the naira currency within a year, have spurred price pressures and sparked the worst cost-of-living crisis in decades in Africa's largest economy. Central to the economic management structure is the creation…