The large literature on costly signaling and the somewhat scant literature on preference signaling had varying success in showing the effectiveness of signals. We use a field experiment to show that even when everyone can send a signal, signals are free and the only costs are opportunity costs,...

We examine the effect of single-sex schooling on students’ competitiveness by studying middle school students in Seoul who were randomly assigned to either single-sex or coeducational schools within their school districts. Contrary to popular belief and existing studies, our results suggest...

We estimate the causal impact of school and classroom gender composition on achievement. We take advantage of the random assignment of Korean middle school students to single-sex schools, co-educational (coed) schools with single-sex classes, and coed schools with mixed-gender classes. Male...

This paper examines non-price competition among colleges to attract highly qualified students, exploiting the South Korean setting where the national government sets rules governing applications. We identify some basic facts about the behavior of colleges before and after a 1994 policy change...

This paper examines whether bonus compensation for managers and workers matter for manufacturing plant productivity. We use a model based on a Cobb-Douglas production function where bonus incentives can increase worker effort and attract more skilled workers leading to increases in plant...

more roses get a larger number of dates than their counterparts.

This paper examines the possibility that a child's years of schooling could increase in the number of siblings, instead of being diminished by competition for parents' resources: if unable to finance the education of their younger children, parents may do so through their older children's labor...

SUMMARY The effect of a program or treatment may vary according to observed characteristics. In such a setting, it may not only be of interest to determine whether the program or treatment has an effect on some sub‐population defined by these observed characteristics, but also to determine for...

Beauty has been shown to be valuable in many markets and supposedly can be improved through plastic surgery. This raises the question of how effective plastic surgery is in improving a person’s beauty and economic outcomes. We find empirical evidence that while people improve their facial...

The main questions of this paper are as follows: Whether and to what extent does rising educational attainment contribute to a country's economic growth by facilitating the reallocation of labor from the agricultural sector to the non-agricultural sector? The transition from the agricultural...