Prof. Kazuaki Shimizu, Dept. of Psychology,
Faculty of Sociology. His site covers psychometric
theories on item and factor analysis, databases of Japanese journals
related to psychological research, introductory SPSS document (pdf)
Jeroen Smits is a social researcher in the Dept of Economics
of the Nijmegen School of Management; he is also affiliated with the Dept of Sociology.
Downloadable papers and SPSS syntax on Heckman two-step procedure and links.