1. Introduction.- 2. Theoretical and Structural Issues in Nigerian Politics.- 3. Continuity and Change in Nigeria's Electoral Democracy.- 4. Party System and the Dominance of the People's Democratic Party, 1999-2015.- 5. Trends in Voter Behaviour, 1999-2015.- 6. Trends in Election Outcomes, 1999-2015.- 7. Democratic Governance and Political Accountability, 1999-2014.- 8. Electoral Reform and Electoral Administration, 1999-2015.- 9. Party Politics in the 2015 Nigerian Elections.- 10. The 2015 Presidential Election.- 11. The 2015 National Assembly Election.- 12. The 2015 Gubernatorial Election.- 13. Conclusion: The 2015 Elections and the Future of Electoral Democracy.