The Open Probability-Based Panel Alliance (OPPA) is a collaboration of three probability-based Internet panels: the GESIS Panel in Germany, the LISS Panel in the Netherlands, and the Understanding America Study (UAS) in the USA. The Alliance facilitates cross-cultural survey research with probability-based panels across the globe, endorsing joint methodological standards to yield representative data. OPPA is driven by research demand.

Partners in OPPA offer unique possibilities for academic research. Use of their panels is not limited to researchers from the country where the infrastructure is located. Primary researchers are provided a one-stop entry point to submit proposals and then choose whether the data should be collected in all countries participating in the network, or in subsets of it.

Click here to visit the OPPA website.