|
|
|
|
| |
|
|
| Glewwe, Paul; Park, Albert; Zhao, Meng. |
| About 10% of primary school students in developing countries have poor vision, yet in virtually all of these countries very few children wear glasses. There has been almost no research on the impact of poor vision on school performance in developing countries, and simple OLS estimates are likely to be biased because students who study more often are likely to develop poor vision faster. This paper presents results from the first year of a randomized trial in Western China that began in the summer of 2004. The trial involves over 19,000 students in 165 schools in two counties of Gansu province. The schools were randomly divided (at the township level) into 103 schools that received eyeglasses (for students in grades 3-5) and 62 schools that served as... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: International Development; Teaching/Communication/Extension/Profession. |
| Ano: 2006 |
URL: http://purl.umn.edu/6644 |
| |
|
|
| Glewwe, Paul; Park, Albert; Zhao, Meng. |
| About 10% of primary school students in developing countries have poor vision, but very few of them wear glasses. Almost no research examines the impact of poor vision on school performance, and simple OLS estimates are likely to be biased because studying harder often adversely affect one’s vision. This paper presents results from a randomized trial in Western China that offered free eyeglasses to 1,528 rural primary school students. The results indicate that wearing eyeglasses for one year increased average test scores of students with poor vision by 0.15 to 0.22 standard deviations, equivalent to the learning acquired from an additional 0.33-0.50 years of schooling, and that the benefits are greater for under-performing students. A simple cost-benefit... |
| Tipo: Working Paper |
Palavras-chave: Teaching/Communication/Extension/Profession. |
| Ano: 2012 |
URL: http://purl.umn.edu/120032 |
| |
|
|
|
