From 1940 to 1990, a 10% increase in a metropolitan area’s concentration of college-educated residents was associated with a 0.8% increase in subsequent employment growth. Instrumental variables estimates support a causal relationship between college graduates and employment growth, but show no evidence of an effect of high school graduates. Using data on growth in wages, rents, and house value...

introduction: to compare the health status of different parts of the health indicators of quality of life is another factor. the purpose of this study is to assess the quality of life for people over 18 years of yazd city. materials and methods: this descriptive cross-sectional study on 352 people over 18 years living in households was conducted in the city of yazd in 1390. cluster sampling was...

Measurements in a highly polluted Asian mega city: observations of aerosol number size distribution, modal parameters and nucleation events P. Mönkkönen, I. K. Koponen, K. E. J. Lehtinen, K. Hämeri , R. Uma, and M. Kulmala University of Helsinki, Department of Physical Sciences, Finland Finnish Institute of Occupational Health, Helsinki, Finland The Energy and Resources Institute (TERI), New De...