In June 2007, the South Korean government, hoping to reduce the state's share of health care costs, passed an amendment to the state-run health care system to transition from a copay system to a coinsurance system for outpatient services. This new policy effectively increased the out-of-pocket...

Using detailed data on the beneficiaries of the Korean National Health Insurance Service (c.2006-2015), this paper estimates the health effects of air pollution in South Korea while controlling for avoidance behaviors. In particular, I investigate changes in the respiratory hospitalization rates...

The development of lithium-sulfur (Li-S) batteries is dogged not only by severe limitations in cycling and rate performances arising from the shuttle effect of lithium polysulfides (LiPSs) but also severe degradation under harsh evaluation conditions of high sulfur loading, lean-electrolyte, and...

This paper estimates the effects of wind direction on ambient air quality in South Korea (c.2006-2014) in order to provide insights into the impacts of the long-range transport of air pollutants from China. I find that the effect of transboundary air pollutants from China accounts for 19 percent...

To address water shortages arising from the 2015 drought in Korea, water authority (K-water) implemented a (ad valorem) subsidy for water savings between October 2015 and January 2016, which is a new policy intervention to reduce water demand. K-water provided households with the subsidy when...

Recommender systems assign products to slots in ways that improve consumers' experience when choosing what to buy. They usually lead to more sales, which increases both consumer surplus and profit. However, firms may also choose which recommender system to use to maximize profit. Furthermore,...