Published papers

This study aimed to vertically scale the mathematics and Japanese academic ability tests of the Japan Child Panel Survey (JCPS) for elementary school first year students through junior high school third year students (grades 1-9 in the U.S.). We used an anchoring test design based on the item response theory. Two test samples were used: JCPS test participants (n = 3,916) and anchoring test participants (n = 7,210). After estimating the item parameters with a two-parameter logistic item response model, the equating coefficients were estimated with the Haebara method. The tests were scaled for elementary school fifth year (grade 5) in the end. The number of items included in the final analyses was 94 for mathematics and 108 for Japanese language studies. The mean level of estimated individual latent academic ability progressed according to grade level. Therefore, the JCPS tests appear to be able to capture the developmental changes of students from elementary school to junior high school. Future research should examine the relationship between children’s academic development and various factors, such as psychological traits or family environment, using the JCPS research data.

This paper provides evidence on whether mandating wider subject variety on high school entrance exams affects long-term educational achievement using Japanese historical experiences. In Japan, where high school education is non-compulsory, prefectural boards of education have retained the freedom to set admission criteria for public high schools within their prefecture, including the number of subjects tested on entrance exams. Using prefectural-level panel data, we estimate the effect of the number and choice of subjects tested at the time of high school entrance on the probability of college attendance three years later. We find that the variety of subjects tested has a positive effect on the later college enrollment. Our findings are broadly consistent with the incentive theory of testing (Lazear, 2006) and the empirical results from other countries.

Various forms of empirical evidence suggest that parental socioeconomic status (SES) is strongly related to educational outcomes and many countries attempt to close achievement gaps among children. Parenting practice is one important mechanism through which educational inequality emerges across families with different SES. In this paper, we show that the class gap in children’s time use and academic achievements reflects parenting styles and parental practices stratified by parental SES by comparatively investigating the cases of China, Japan, and the USA, drawing on three sets of nationally representative longitudinal data. We find that for children aged 10–15 in China, parental SES has a strong impact on children's homework time and academic performance. Similar patterns are found in the results of 10–15-year-old children in Japan; however, homework time more weakly relates to the parents' education level. Moreover, restricting the samples to 14-year-old children and comparing the three countries, we find that the test score gap among parental SES is the largest in the USA; to fill the gap in math test scores between the first and fourth income quartiles, a sizable number of additional hours spent on homework are needed in the USA, compared to China and Japan.

There is wide variation in the degree of gender gap in test scores around the world, suggesting the strong influence of institutions, culture and inequality. We present comparative evidence on the gender gap in educational achievement in China, Japan, and the USA, with an emphasis on the gender-specific effect of parental income and education, and the child’s own preferences for study subjects. We used three major national representative longitudinal surveys with rich information about cognitive outcome measures of respondent children as well as educational investment and parental socio-economic status that allow us to analyze their inter-relationship. We found that low household income tends to have more adverse effects on language test scores for boys than for girls in the USA, as is consistent with previous studies. However, it does not have an impact on gender gap in test scores in China and tends to affect girls more adversely than boys in Japan.

Can smaller classes lead to better educational outcomes and greater equality in achievement? We estimate the causal effects of class size on achievement tests by using discontinuous changes in class size under the Japanese public compulsory education system. We employ a value-added model that uses achievement tests conducted at two different times during the same school year. Our results show that a reduction in class size has significantly positive effects on Japanese language test scores in the sixth grade, especially at schools in wealthy areas. However, we find no evidence that a universal small class policy closes the achievement gap among schools. © 2013 Japanese Economic Association.