A recent calculation by Chay and Rey has shown that instantons may make a significant contribution to the lepton energy spectrum near its endpoint. Using an ansatz borrowed from the study of high energy baryon number violating processes, we investigate whether these corrections could spoil the relation between the nonperturbative contributions to this spectrum and to the photon energy spectrum ...

Guidelines for Antimicrobial Stewardship Training and Practice Christine B Teng,1,5 MS(Clin Pharm), BCPS(AQ-ID), Winnie Lee,2 B.Pharm(Hon), BCPS(AQ-ID), Chay Leng Yeo,3 B.Pharm (Hon), BCPS, Siok Ying Lee,4 BSc(Pharmacy)(Hon), BCPS, Tat Ming Ng,5 BSc(Pharmacy)(Hon), Siang Fei Yeoh,3 MClinPharm, Wee Heng Lim,6 BSc(Pharmacy), Andrea L Kwa,2 PharmD, BCPS(AQ-ID), Koh Cheng Thoon,7 MBBS, MRCPCH, MMed...

Prof. Ken Chay Department of Economics Fall Semester, 2005 ECON 142 SKETCH OF SOLUTIONS FOR APPLIED EXERCISE #2 Question 1: a. Below are the scatter plots of hourly wages and log-wages on the y-axes and education on the x-axis, respectively. In both figures, there appears to be evidence of heteroskedasticity in the variance of the outcome with respect to education. Notice how the dispersion of ...

Anniversary of the founding of Resources for the Future. This paper would not have been possible without my collaboration with Kenneth Chay on a series of papers on the health impacts of airborne particulates pollution. This paper discusses some of the results from our papers, but even more importantly our collaboration has sharpened my thinking about empirical work and has directly influenced ...

A recent study by Autor et al. (2008) has pointed out that the skill premia has risen in the US since the 60s. Several other authors have highlighted these trends across different OECD countries (e.g., Katz and Murphy, 1992; Machin, 1996; Goldin and Katz, 1999; Chay and Lee, 2000, Conte and Vivarelli, 2007). A common consensus points to the on-going growth of the demand for high-skilled workers...