discovered in the IBM surveys had reproduced themselves significantly in the sample of his students. This was the first hard piece of evidence that the differences among countries was not specific to IBM, but, instead, were due to a generalized set of shared socialization skills that were specific to people having grown up in the same country, and not necessarily the same organization. Hofstede rejoined IBM and informed it of the enormous database that IBM had at its disposal and wanted to create a research project to continue this new way of examining the data. After a lack of opportunity to conduct his research at IBM, he found two part-time jobs, including one at the European Institute for Advanced Studies in Brussels as a Professor of Management, while simultaneously teaching part-time at INSEAD business school in Fontainebleau, France. Between 1973 and 1979, he worked on the data, and analyzed it in a variety of ways. He used existing literature in psychology, sociology, political science, and anthropology to relate his findings in a larger scope of study. In 1980, he published his book Culture's Consequences, where the results of his analysis were presented. Research on national cultures and critiques Research on national cultures Hofstede's analysis defined four initial dimensions of national culture that were positioned against analysis of 40 initial countries. As a trained psychologist, he began his analysis of the survey data he had collected at IBM at the individual respondent level. At the end of two years, he realized he needed an "ecological" analysis, in which respondents were contextualized by their countries. By aggregating individuals as societal units, he could examine national cultures rather than individual personalities. Hofstede's model explaining national cultural differences and their consequences, when introduced in 1980, came at a time when cultural differences between societies had become increasingly relevant for both economic and political reasons. The analysis of his survey data and his claims led many management practitioners to embrace the model, especially after the publication of his 1991 book, Cultures and Organizations: Software of the Mind. In 1980, Hofstede co-founded and became the first Director for the IRIC, the Institute for Research on Intercultural Cooperation, located at Tilburg University since 1998. Much of Hofstede's research on the basic dimensions of nations came through the IRIC. In 2001, Hofstede published an entirely re-written second edition of Culture's Consequences. In 2010, a third edition of Cultures