Enrico Fermi had to cajole his friend Ettore Majorana into publishing his big idea: a modification of the Dirac equation that would have profound ramifications for particle physics. Shortly afterwards, in 1938, Majorana mysteriously disappeared, and for 70 years his modified equation remained a rather obscure footnote in theoretical physics (Box 1). Now suddenly, it seems, Majorana’s concept is...

in 2010, the ministry of education of one of the most diverse provinces in canada initiated the implementation of a support program for newcomer students to facilitate their academic, linguistic, social, and cultural adaptation in french speaking schools. this longitudinal multiple case study will document how immigrant parents support their children’s learning, and create a home environment co...

The purpose of this study was to examine the expected returns of Carhart model compared to the capital asset pricing model and the implicit capital cost model based on cash and capital returns of growth and value stocks. The statistical population consisted of the companies listed in Tehran Stock Exchange and the time domain is between 2007 and 2016. By choosing Cochran sampling, 126 companies ...

OBJECTIVES We compared the differences in median age at spermarche among 11 ethnic minorities in 2010, estimated the trends regarding age at spermarche in different ethnic minorities from 1995 to 2010, and explored the association of spermarche with body mass index (BMI). METHODS We used four cross-sectional Chinese National Surveys on Students' Constitution and Health (CNSSCH, 1995, 2000, 20...

This paper investigates the evolution of prices and returns in the art market since the middle of the previous century. We first compile a comprehensive list of more than 10,000 artists and then build a dataset that contains information on more than 1.1 million auction sales of paintings, prints, and works on paper. We perform an extensive hedonic regression analysis that includes unique price-...

In this paper, we examine the impact of including environmental, social and governance (ESG) criteria in allocation equity portfolios. We focus on risk return characteristics resulting ESG portfolios investment strategies. Two specific measures are considered to quantify performance a company; rating greenhouse gas (GHG) emission intensity. For both measures, carry out empirical portfolio analy...

Evidence exists for an epidemiological trend of transmission concentrations COVID-19 within migrant communities from tropical weather conditions. Minority groups are over-represented in hospitalisations and deaths the virus, it appears that observed anomaly may be due to multifactorial causes. Underactive immune responses cooler temperatures diminished synthesis vitamin D, both which associated...

An unbiased employer engages in optimal sequential search by drawing from two equally quali…ed subpopulations of job candidates who di¤er in their “discourse systems.” That is, minorities convey noisier unbiased signals of ability than non-minorities. We show that when the employer is selective, minorities are underrepresented in the workforce, …red at greater rates, and underrepresented among ...