Who work on zero hour contracts, how many are they and what kinds of employment contracts exist? A zero hour contract is an employment contract which neither stipulates any weekly working time nor when the work is to take place. The report was written by Kristine Nergaard (pictured), Kristin Alsos, Mona Bråten and Ragnhild Steen Jensen. The report is financed by the Ministry of Labour and Social Affairs.