This paper investigates whether social security contributions affect corporate financing decisions. Treating the 2011 Social Insurance Law in China as a quasi-natural experiment, our difference-in-differences framework utilizes two-dimension variations: initial social security contribution rates...

Peer-Assisted Learning Strategies (PALS) was implemented for supplementary reading classes in a Korean elementary school. The treatment group children were exposed to PALS during 20 min sessions, 4 times a week, for 8 weeks. The impacts of PALS were investigated in 3 aspects using a...

In this paper, we analyze how a change in the labeling (guideline) regarding exposure to air pollution affects the consumption of respiratory medicine. In 2018, the Government of South Korea changed air pollution warning standards to a level that was more severe than it was in reality and as...

We investigate the effects of attending a single-sex high school on future labor market outcomes through use of a randomized natural experiment. South Korean students are randomly assigned, by lottery, to single-sex or co-educational schools within their school districts. Using a large set of...