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Participants in Internet net news bulletin board discussions can argue with others whom they do not know. The nature of each message in a discussion can be characterized by the frequency with which keywords appear in the message. This incidence or frequency can be summarized as a principal component score. By deriving two characteristic indexes – auto‐correlation coefficients and power spectra – from the principal component scores, we have come up with a novel method. Applying this method to analyze three large net news threads, the index plots revealed two‐generation cyclic fluctuations. Comparing these plots with actual points of conflict obtained by reading the message contents, a fairly good correlation was obtained between the two and it was found that most of the conflicts were among participants with different cultural backgrounds.

The purpose of this paper is to demonstrate the actual conditions of Japanese professors' mobility and to carry out an analysis of the principle on which university researcher mobility is based and of the relationship between mobility and research performance.

Using the Japanese university researcher database which covered job title, research background, research publication performance and so on, the study analyzed the relationship between mobility and the publication rate before/after move.

The paper finds that moves from a research to an education university rarely occur. Moves from an education to a research university, on the other hand, occur with relative frequency. To achieve a move, a high publication rate is required. Post‐move publication rate increased greatly for those who moved from an education to a research university and also those who moved from an education university to another education university.

In Japan, company employees make decisions depending on expectations of further fulfilment in their companies rather than on mercenary calculations of present best interests. It was discovered that researchers have a desire to move to a better university or one with a better research environment for a brighter future. It is thought that while company employees depend upon the future within the firm, professors depend upon the future within the academic community.

Up to now the relationship between mobility and research performance of professors is not necessarily clear in Japan. In this study of the economics field it has become more apparent.