Occupational safety and profit maximization: Friends or foes?

The rise of the Industrial Revolution is often depicted as a cause of hazardous working conditions and is skillfully epitomized in William Blake's tale of a child chimney sweeper. Conventional wisdom puts firm profit in conflict with occupational safety. We reexamine this argument noting that injuries are very costly to firms because they lead to higher wage premiums, worker compensation, and costly work stoppages. We hypothesize that it is precisely for these reasons that firms in the industries with dangerous working conditions have the strongest incentives to innovate and substitute more capital for labor. Using a longitudinal panel of U.S. industries, we test and confirm our hypothesis that higher injury rates lead to higher capital stock per worker, over time. Moreover, our estimates suggest that firms provide more capital and equipment per worker than what would have been there based solely on the compensating wage differential.     

Ignorance is not bliss: On the role of education in subjective well-being

This study estimates the impact of education on self-reported happiness across 50 American states using the recently available Gallup-Healthways Well-Being Index (WBI). A 3SLS model is used to estimate the simultaneous impact of education, income, and health on aggregated subjective well-being (SWB) as measured by state-level WBI. Over 80% of the variation in SWB across states can be explained by differences in education, income, health, age, trust, stress, temperature, religion, and rainfall. Higher education (college degree) has a relatively strong positive effect on SWB, but secondary education (high school) does not. We find no statistically significant educational spillover on SWB across state borders, which suggests that the positive effect of higher education on SWB is mostly due to private non-monetary benefits rather than positive externalities.     

A simple algorithm for the adaptation of scores and power behavior of the corresponding rank test

The purpose of this paper is twofold:On one hand we want to give a very simple algorithm for evaluating a special rank estimator of the type given in Behnen, Neuhaus, and Ruymgaart (1983) for the approximate optimal choice of the scores-generating function of a two-sample linear rank test for the general testing problem H_o:F=G versus H₁:F ≤ G, F ≠ G, in order to demonstrate that the corresponding adaptive rank statistic is simple enough for practical applications. On the other hand we prove the asymptotic normality of the adaptive rank statistic under H (leading to approximate critical values) and demonstrate the adaptive behavior of the corresponding rank test by a Monte Carlo power simulation for sample sizes as low as m=10, n=10.     

白俄罗斯、哈萨克斯坦和俄罗斯海关同盟述略——以基本条款为主线

白俄罗斯、哈萨克斯坦和俄罗斯海关同盟是顺应俄罗斯联邦因政治格局的变化而产生的新生物。从海关同盟的历史进程来看,成员国之间的特殊亲缘关系是促成同盟的重要基础。在组织机构中,作为同盟常设机构的欧亚经济委员会是其主干。同盟运作的法律体系由其具有联邦特色的国际法和国内法构成。     

On the Ghoudi,Khoudraji, and Rivest test for extreme‐value dependence

Ghoudi, Khoudraji & Rivest [The Canadian Journal of Statistics 1998;26:187–197] showed how to test whether the dependence structure of a pair of continuous random variables is characterized by an extreme‐value copula. The test is based on a U‐statistic whose finite‐ and large‐sample variance are determined by the present authors. They propose estimates of this variance which they compare to the jackknife estimate of Ghoudi, Khoudraji & Rivest ( 1998 ) through simulations. They study the finite‐sample and asymptotic power of the test under various alternatives. They illustrate their approach using financial and geological data. The Canadian Journal of Statistics © 2009 Statistical Society of Canada     

Symmetry of functions and exchangeability of random variables

We present a new approach for measuring the degree of exchangeability of two continuous, identically distributed random variables or, equivalently, the degree of symmetry of their corresponding copula. While the opposite of exchangeability does not exist in probability theory, the contrary of symmetry is quite obvious from an analytical point of view. Therefore, leaving the framework of probability theory, we introduce a natural measure of symmetry for bivariate functions in an arbitrary normed function space. Restricted to the set of copulas this yields a general concept for measures of (non-)exchangeability of random variables. The fact that copulas are never antisymmetric leads to the notion of maximal degree of antisymmetry of copulas. We illustrate our approach by various norms on function spaces, most notably the Sobolev norm for copulas.     

Infant Perception of Surface Texture and Relative Height as Distance Information: A Preferential‐Reaching Study

Two preferential‐reaching experiments explored 5‐ and 7‐month‐olds’ sensitivity to pictorial depth cues. In the first experiment, infants viewed a display in which texture gradients, linear perspective of the surface contours, and relative height in the visual field provided information that two objects were at different distances. Five‐ and 7‐month‐old infants reached preferentially for the apparently nearer object under monocular but not binocular viewing conditions, indicating that infants in both age groups respond to pictorial depth cues. In the second experiment, texture gradients and linear perspective of the surface contours were eliminated from the experimental display, making relative height the sole pictorial depth cue. Seven‐month‐olds again reached more often for the apparently nearer object under monocular, but not binocular viewing conditions. By contrast, the 5‐month‐olds’ reaching behavior did not differ between viewing conditions. These results indicate that 7‐month‐olds respond to the depth cue of relative height but provide no evidence of responsiveness to relative height in 5‐month‐olds. Both age groups responded more consistently to pictorial depth in Experiment 1 than in Experiment 2.     

On vertex-parity edge-colorings

A vertex signature \(\pi \) of a finite graph G is any mapping \(\pi \,{:}\,V(G)\rightarrow \{0,1\}\). An edge-coloring of G is said to be vertex-parity for the pair \((G,\pi )\) if for every vertex v each color used on the edges incident to v appears in parity accordance with \(\pi \), i.e. an even or odd number of times depending on whether \(\pi (v)\) equals 0 or 1, respectively. The minimum number of colors for which \((G,\pi )\) admits such an edge-coloring is denoted by \(\chi '_p(G,\pi )\). We characterize the existence and prove that \(\chi '_p(G,\pi )\) is at most 6. Furthermore, we give a structural characterization of the pairs \((G,\pi )\) for which \(\chi '_p(G,\pi )=5\) and \(\chi '_p(G,\pi )=6\). In the last part of the paper, we consider a weaker version of the coloring, where it suffices that at every vertex, at least one color appears in parity accordance with \(\pi \). We show that the corresponding chromatic index is at most 3 and give a complete characterization for it.     

Broadcasting multiple messages in the 1-in port model in optimal time

In the 1-in port model, every vertex of a synchronous network can receive at most one message in each time unit. We consider simultaneous broadcasting of multiple messages from the same source or from distinct sources in such networks with an additional restriction that every received message can be sent out to neighbors only in the next time unit and never to already informed vertex. We use a general concept of level-disjoint partitions developed for this scenario. Here we introduce a subgraph extension technique for efficient spreading information within this concept. Surprisingly, this approach with so called biwheels leads to simultaneous broadcasting of optimal number of messages on a wide class of graphs in optimal time. In particular, we provide tight results for bipartite tori, meshes, hypercubes, Knödel graphs, circulant graphs. We also propose several open problems and conjectures.     

Heritage practices,indigenismo, and coloniality: studying-up into racism in contemporary Mexico

ABSTRACT

Based on two years of ethnographic fieldwork traveling with three ‘artesanos’ (mask-makers) from rural Michoacan and ‘studying up’ as they circulated through fairs and folk art competitions across Mexico, this paper describes how indigenous artists in rural Michoacan are routinely incentivized and sometimes cudgeled within majoritarian institutions of art in Mexico to enact self-racializing stereotypes and stigmatized indigenous identities and to produce and showcase the so called traditional works and performances that conform to static and primitivist stereotypes. At play here is the interlinked legacy and persistence of paternalism, indigenismo, nationalism, and primitivism. These logics continue to play out in reconstituted terms beyond or after the legal, political, and official embrace of pluriculturalism and the multiethnic community in Mexico. The embedded ethnographic vignette and the analysis that follows suggests how a strategy of ‘studying-up’ into coloniality furthers the delinking program. In line with the strategy of delinking, the ethnographic and conceptual work in this article proceeds by decentring or provincializing a set of dichotomous or binary oppositions that are commonly expressed and articulated within the Mexican heritage field, which would oppose indigenous tradition and culture against urban and mestizo modernity, civilization, and culture. The analysis diverges from a common or dominant approach to delinking in one crucial way – it does not engage in ‘borderthinking’ by looking towards the margins; it does not counterpose subaltern indigenous knowledge with privileged occidental knowledge. Instead, presenting an analysis that ‘studies up’, the paper applies the tools of decolonial theory and method and critical theory to analyse and interrogate elite Mexican patrimonial institutions and culture, which in fact epitomize coloniality and engender indigenous vulnerability. The article concludes by discussing the value and the potential pitfalls of this approach, in order to further the decolonizing project from within the space of cultural studies.