Ralph Lewis Professor

Office: NORC 249
Phone: 773-256-6324

Ralph Lewis Professor

Office: NORC 249
Phone: 773-256-6324


B.S. University of Tokyo, 1972
M.A. University of Chicago, 1979
Ph.D. University of Chicago, 1981


Kazuo Yamaguchi is the Ralph Lewis Professor. He was department chair in 2008-2011, and was Hanna Holborn Gray Professor in 2005-2013. Yamaguchi is interested in statistical models for social data and mathematical models for social phenomena, life course, rational choice theory, stratification and mobility, demography of family and employment, process of drug use progression, and Japanese society. His current research focuses on methodology (causal models for categorical data, decomposition analysis, and panel data analysis), and gender inequality and work-life balance in Japan and Korea.


Center and Program Affiliation

Voting faculty member: Committee on Quantitative Methods in Social, Behavioral, and Health Sciences.

Voting faculty member: The Center for East Asian Studies, Japan Program

Board member: Graham School of Continuing Liberal Arts and Professional Education

Research Fellow: Center for International Social Science Research (CISSR) 


Selected Publications

Gender Inequality in Japanese Workplace and Employment Theories and Empirical Evidence. 2019 (In press). Springer.

“Japan’s Gender Gap.” Finance and Development, International Monetary Fund. March 2019 issue: 26-29.

“Decomposition Analysis of Segregation.” Sociological Methodology. Vol 47:212-45. 2017.

“A Comparison of the Determinants of Low Marital Fertility between Korea and Japan. (with Yoosik Youm)," Korean Journal of Sociology 50(5): 23-43. 2016.

“Determinants of the Gender Gap in the Proportion of Managers among White-collar Regular Workers in  Japan,” The Japan Labor Review 13(3);3-41. 2016.

“Cross-sectional and Panel Data Analyses of an Incompletely Observed Variable Derived from the Nonrandomized Method for Surveying Sensitive Questions.” Sociological Methods & Research 45(1):41-68. 2016.

 “Decomposition of Gender or Racial Inequality with Endogenous Intervening Covariates: An Extension of the DiNardo-Fortin-Lemieux Method.”  Sociological Methodology 45: 388-428. 2015.

 “New Regression Models with Egocentric Social Network Data: An Analysis of Political Party Preference in Japan.” Sociological Methodology 43:312-345. 2013.

“Loglinear Causal Analysis of Cross-classified Categorical Data” Sociological Methodology 42: 257-285. 2012. 

“A Macrocounterfactual Analysis of Group Differences: An Application to the Gender Wage Gap in Japan.” Sociological Methodology 41:223-55. 2011

Work-life Balance: Empirical Evidence and Policy Implications (in Japanese) 2009. Nikkei Publications, Tokyo. Korean translation published in 2010.

“Racial Differences in Intergenerational Mobility over the Past 30 Years: A Multinomial Logit Latent-Class Regression Analysis.” Research in Social Stratification and Mobility 27: 65-78. 2009.

Diversity: Two Fables. (In Japanese) 2008. Tokyo, Toyo-Keizai Publications.  Korean translation published in 2010; Traditional Chinese translation published in 2011; Simplified Chinese translation in press (2019).

 “Four Useful Finite Mixture Models for Panel-Data Analysis with a Categorical Dependent Variable.”  Sociological Methodology 38: 283-328. 2008.

“Rationality of Tolerance: An Insight into The Parent-Child Relationship.” Rationality and Society 18: 275-303. 2006.

“Accelerated Failure-Time Mover-Stayer Regression Models for the Analysis of  Last-Episode Data.”  Sociological Methodology. Vol 33: 81-110.  2003.

 “A Liang-Zeger Method for Dyadic Interdependence in the Analysis of Social Networks."  Sociological Methodology. Vol. 33:343-380. 2003.

“Class Identification of Married Working Women and Men in America.” (with Yantao Wang). American Journal  of Sociology. 108: 440-75. 2002.

"Multinomial Logit Latent-Class Regression Models: An Analysis of the Predictors of  Gender-Role Attitudes among Japanese Women."  American Journal of Sociology 105: 1702-40. 2000.

"A New Method for Information Diffusion in Heterogeneous Social Networks."  (with Vincent Buskens). Sociological Methodology. Vol. 29: 281-325. 1999.

"Rational-Choice Theories of Anticipatory Socialization and Anticipatory Nonsocialization." Rationality and Society 10: 163-99, 1998.

"Mover-Stayer Models for Analyzing Event Nonoccurrence and Event Timing with Time-Dependent Covariates: An Application to an Analysis of Remarriage." Sociological Methodology 28: 327-61, 1998.

"Parametric Event Sequence Analysis: Racial/Ethnic Differences in Patterns of Drug-Use Progression." Journal of the American Statistical Association 91: 1388-99, 1996.

"The Power in Networks of Substitutable and Complementary Exchange Relations: A Rational-Choice Model and an Analysis of Power Centralization." American Sociological Review 61:308-32, 1996.

"Some Loglinear Fixed-Effect Latent-Trait Markov-Chain Models: An Application to a Dynamic Analysis of Personal Efficacy under the Influence of Divorce/Widowhood." Sociological Methodology, Vol. 26: 39-78. 1996.

"The Stopping and Spacing of Childbirths and Their Birth-History Predictors: Rational-Choice Theory and Event-History Analysis." (with Linda Ferguson). American Sociological Review 60:272-98, 1995.

 "Some Accelerated Failure-Time Regression Models Derived from Diffusion Process Models: An Application to a Network Diffusion Analysis." Sociological Methodology, Vol. 24: 267-300. 1994.

"Accelerated Failure‑Time Regression Models with a Regression Model of Surviving Fraction: An Application to the Analysis of 'Permanent Employment' in Japan." Journal of the American Statistical Association 87: 284-292. 1992.

 Event History Analysis. Sage Publications. 1991.

"Homophily and Social Distance in the Choice of Multiple Friends: An Analysis Based on Conditionally Symmetric Log‑Bilinear Association Models" Journal of the American Statistical Association 85:356-366.