Accountability, maps and inter- generational equity: evaluating the Nigerian oil spill monitor

The Oil Spill Monitor (OSM) is an innovative public sector accounting system intended to improve the regulation of oil pollution in the Niger Delta through greater transparency and stakeholders’ engagement. The Nigerian OSM, an online accounting and geographic information system, was set up by non- governmental organizations before becoming part of the regulator’s accountability system. Problems with data quality, regulatory enforcement and remediating practices meant that improved accountability and stakeholder engagement were necessary but not sufficient in this case.