Students at Harvard, Duke and Penn have pulled the most all-nighters this year, says new research.

America's top schools are well-represented in our ranking of the colleges which pull the most all-nighters, which is based on data from a Tab survey of 2000 self-reporting students.

Harvard comes top as students there claim they have done an average of six all-nighters since the academic year began.

See where your college ranks below – the figures represent the average number of all-nighters pulled since class started in August. All Tab schools are included, except for colleges with statistically insignificant responses.