The Han-Minority Achievement Gap, Language, and Returns to Schools in Rural China

摘要

The goal of this article was to document and explain the gap in educational achievement between Han and minority students in primary schools in western China. In our survey of 300 schools in Shaanxi, Gansu, and Qinghai provinces (involving nearly 21,000 fourth- and fifth-grade students), we find large differences in achievement on standardized exams between Han and minority students. On average, minority students perform 0.25 SD lower in math and 0.22 SD lower in Chinese. Most strikingly, minority students who do not generally speak Mandarin as their primary language score 0.62 SD lower than Han in math and 0.65 SD lower than Han in Chinese. Using decomposition methods pioneered by Oaxaca (1973) and Blinder (1973), we find that most of the achievement gap between Han and minority students with no alternative ethnic language can be explained by differences in endowments of student, family, and school characteristics. Of these, differences in students and family characteristics appear to contribute the most to differences in achievement. Little of the gap between Han students and non-Mandarin minority students (Salar and Tibetan in our sample), however, can be explained by endowment differences. Comparing these students only to Han students in the same schools significantly reduces the size of the achievement gap, yet a difference of more than 0.2 SD persists. None of this remaining gap is explained by differences in endowments. Although several explanations are possible, we believe that a likely explanation is that the ability of students to learn may be hindered by difficulty comprehending instruction in Mandarin (given that no schools in our sample provided instruction or texts in minority languages). While we cannot say with certainty why these students may benefit less from a given amount of schooling inputs, our analysis suggests that teachers play a significant role.