The Dutch Polling Indicator (‚Peilingwijzer‘) combines all Dutch national opinion polls into one estimate of support for political parties. It is based on the opinion polls of EenVandaag/Intomart Gfk, Ipsos, I&O research, Kantar Public, LISS Panel and Peil.nl. The Polling Indicator is created by Tom Louwerse, assistant professor in political science at Leiden University.