In 1925, Wilhelm Vershofen founded the „Institut für Wirtschaftsbeobachtung der deutschen Fertigware” (IWF) at the Nuremberg School of Economics. The aims are cost comparisons and applied "consumption research" to observe and better understand consumer behavior. Prof. Vershofen wins Consul Wilhelm R. Mann, member of the board of IG Farben, for his project.

In 1934, the Gesellschaft für Konsumforschung e.V. (GfK) was founded. In addition to Prof. Dr. Vershofen, the Board of Management also includes Dr. Erich Schäfer and the later German Chancellor Dr. Ludwig Erhard. Members can be individuals, especially business executives, but also companies and economic policy associations

As early as 1934, our founders laid the intellectual basis that researching market decisions is a very central topic for understanding markets and consumers as well as the success of products.

The association conducted 71 different surveys until the end of the war, including the awareness of trademarks, personal care and soap consumption in Germany, structure of beverage consumption in Germany, patient and medicines, assessment of fuel company road maps.

Prof. Dr. Georg Bergler rebuilt GfK‘s business under difficult conditions. An important step was his application for permission to the American occupation forces. After permission was granted in 1947, work began on rebuilding. In 1950 the situation stabilized due to the rapidly increasing number of members.

Panel research was established at GfK from the 1950s onwards. In 1954, GfK began measuring the shopping behavior of Bavarian consumers: 1,000 households filled-in a shopping diary for two months.

From 1967, international research was expanded. This led to the foundation of companies initially in Austria, the Netherlands and Sweden. From around 1980, GfK companies were founded in the key European countries, initially in the UK and France, and later in Italy and Spain.

In view of the growing importance of retailing for sales, the association began to strategically expand its retail research in 1970.

The reason for the spin-off of the commercial divisions in 1984 was a ruling by a regional court stating that the entrepreneurial activities were no longer compatible with the legal form of an "ideal association". From this point on, the association concentrated on enhancing market and sales research through studies, basic research and its role as a shareholder in GfK GmbH and its successor companies.

In 1990, GfK GmbH was transformed into a stock corporation, and in 1999 it was listed on the official market of the Frankfurt Stock Exchange. At that time, GfK was already a globally oriented market research company represented in 37 countries. The association - as a non-profit organization - continued to fullfill its statutory task: the enhancement of market research.

The association should be perceived as independent and no longer as a "part" of GfK SE. In order to give it a distinctive identity with the research focus "market decisions", it was renamed "Nuremberg Institute for Market Decisions" (NIM) at the end of 2018. Founder and Anchor Shareholder of GfK SE.