Are You Ready for Some Football? Estimating the Effect of American Football Season on Labor Supply in the United States

American football season reduces the Monday labor hours of employed men by two-thirds of an hour. A similar effect is found for Friday labor hours. We term these effects the “hangover effect” and “happy hour effect.” Consistent with a wide class of labor market models, the labor supply effect varies over the business cycle, increasing in expansions. The hangover effect implies an intertemporal elasticity of labor supply on the order of 0.014. Evaluated at the median hourly wage, our estimates imply an annual economic cost of foregone earnings associated with football season in the neighborhood of $5.06 billion.

Is Michał Kalecki's theory of investment applicable today? The case study of agricultural holdings in the EU countries

The purpose of the article is to recognise whether Michał Kalecki‘s investment theory works in the functioning of farms in the EU countries. We use the data of farms of the EU FADN (Farm Accountancy Data Network) system. The dynamic panel (the 1st difference generalised method of moments – GMM) estimator model was employed for analysis. The assessments were related to the economic size of farms. The results have allowed the partial confirmation of the validity of Kalecki's model to explain agricultural holdings adjustment mechanisms in the investment sphere. It is about medium-large (ES4) and large farms (ES5). In smaller farms (ES1–3) this mechanism was not recorded, and also in the largest agricultural holdings (ES6) where the development mechanism is more complex. Thus the size of farms determines different changes in investments activity in analysed groups of farms. Results suggest that a demand effect of investment expenditures, in the case of the examined group of farms, predominates to supply effect. It can be attributed to the fact that agriculture through the institutional system (the CAP – Common Agricultural Policy) and the peculiarities of this sector have weakened internal competition. We should be aware that the developmental mechanisms of agricultural holdings in the investment sphere are complex, and Kalecki’s theory may somewhat better understand these mechanisms.

Increasing Oxygen Mass Fraction in Blind Headings of a Plateau Metal Mine by Oxygen Supply Duct Design: A CFD Modelling Approach

Hypoxia problem has always been a difficult point in plateau tunneling projects. To solve this problem, a blind heading face in a plateau metal mine in western China was taken as the physical model, and the computational fluid dynamics was used to analyze the oxygen mass fraction distribution and oxygen-increasing effect in 1 m, 3 m, and 5 m roadway sections from the heading face. The optimal ventilation system was first built to obtain the optimum height and length of the airflow ducts. Then different cases with various oxygen supply duct designs were built in 2 scenarios. The results found that different oxygen supply duct design has significant influence on the oxygen distribution in the heading face. Also, each design has different optimal height of oxygen outlet. The oxygen supply effect is best when some small holes are made in the oxygen supply duct to diffuse oxygen to the working surface. The finding of this paper is helpful for effective and economical oxygen supply in roadway excavation of plateau metal mine and tunnel.

Does Context Matter? Differences in the Use of Congregate Care by Black, White, and Hispanic Youth

<p>In the paper, we examine the relationship between county context and the use of congregate care by White, Black, and Hispanic youth, aged between 10 and 17. We measure the use of congregate care as the probability a young person will be placed in congregate care during an out-of-home care spell. We define county context in three ways: urbanicity, social disadvantage, and the supply effect on demand. We also include whether states mandate the use of an assessment to regulate entry into congregate care. Our primary interest is organized around differences in county context, the rate of congregate care utilization, and the connection between context and disparity. We find that, regardless of race, congregate care placement rates tend to be higher in counties where supply affects demand. However, in those counties, the Black/White disparity tends to be lower and the Hispanic/White disparity tends to be higher. The association between a mandatory assessment policy and congregate care placement is in the expected direction. After describing the study limitations, we discuss implications for future research and policy.</p>

Does Context Matter? Differences in the Use of Congregate Care by Black, White, and Hispanic Youth

<p>In the paper, we examine the relationship between county context and the use of congregate care by White, Black, and Hispanic youth, aged between 10 and 17. We measure the use of congregate care as the probability a young person will be placed in congregate care during an out-of-home care spell. We define county context in three ways: urbanicity, social disadvantage, and the supply effect on demand. We also include whether states mandate the use of an assessment to regulate entry into congregate care. Our primary interest is organized around differences in county context, the rate of congregate care utilization, and the connection between context and disparity. We find that, regardless of race, congregate care placement rates tend to be higher in counties where supply affects demand. However, in those counties, the Black/White disparity tends to be lower and the Hispanic/White disparity tends to be higher. The association between a mandatory assessment policy and congregate care placement is in the expected direction. After describing the study limitations, we discuss implications for future research and policy.</p>