The behavioral function: An inquiry into the relation between behavior and utility

The idea that an individual's behavior is a function of its utility or Value represents a very common and fundamental assumption in the study of human conduct. In this paper it will be attempted to determine the nature of this function more precisely. Adopting a probabilistic conception of human action, it appears that an exponential function perfectly satisfies the empirical as well as formal conditions which it seems necessary to impose upon it initially. Empirical research into behavioral change lends additional support to the function thus constructed.     

Where did the new economic sociology come from?

Like all new research fields, the “new economic sociology” was produced by the redeployment of relatively diverse researchers under a single academic label. Academic entrepreneurs in the second half of the 1980s took up the traditional term of the European “founding fathers” claiming they were renewing the discipline while distinguishing themselves from (1) the old homegrown denomination “economy and society,” (2) anti-disciplinary currents such as neo-Marxism, and (3) interdisciplinary movements like “socioeconomics.” The relative unity of the new economic sociology was due more to this set of demarcations than to a specific intellectual approach. The new economic sociology obtained its scientific legitimacy by bringing together two promising new currents: network analysis and neo-institutionalism, along with a more marginal cultural mode of analysis. While there had been very little exchange among these currents, mutual references became more ecumenical once a common label had emerged and distinct intellectual programs were launched. Institutional legitimacy was quickly obtained thanks to the support of the Russell Sage Foundation, enabling a process of expansion that in Europe developed far more slowly. The case of the “new economic sociology” demonstrates that the creation of new subdisciplines cannot be understood merely through the analysis of direct interactions among persons linked to each other by inter-acquaintanceship. In accordance with a field theoretical approach, academic entrepreneurs function under structural conditions which must also be taken into account. Among these structural conditions were changes in the academic field itself (due to demographical effects, the imperialism of economics, and the surge in Business Schools) as well as in the political sphere (the rise of neo-liberalism).

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Depression and exercise in elderly men and women: findings from the Swedish national study on aging and care

This study investigated the relationship between light and strenuous exercise and depression, as well as gender differences in this relationship, in a representative sample of 860 elderly Swedish suburb-dwelling men and women in age cohorts from 60 to 96 years, drawn from among participants in the Swedish National Aging and Care study. The relationship between depression and self-reported changes in exercise status over time was also examined. Exercise activities were measured with four survey questions, and depression, with the Montgomery Asberg Depression Rating Scale. The inactive elderly had higher depression scores than more active individuals, both in terms of light and strenuous exercise. The continuously active group had lower depression scores than both continuously inactive individuals and individuals reporting a shift from activity to inactivity during the preceding year. Light exercise had a somewhat stronger effect on depression for women.     

An iterative sparse algorithm for the penalized maximum likelihood estimator in mixed effects model

In this paper, we propose a new iterative sparse algorithm (ISA) to compute the maximum likelihood estimator (MLE) or penalized MLE of the mixed effects model. The sparse approximation based on the arrow-head (A-H) matrix is one solution which is popularly used in practice. The A-H method provides an easy computation of the inverse of the Hessian matrix and is computationally efficient. However, it often has non-negligible error in approximating the inverse of the Hessian matrix and in the estimation. Unlike the A-H method, in the ISA, the sparse approximation is applied “iteratively” to reduce the approximation error at each Newton Raphson step. The advantages of the ISA over the exact and A-H method are illustrated using several synthetic and real examples.     

Accuracy of regularized D-rule for binary classification

We consider a regularized D-classification rule for high dimensional binary classification, which adapts the linear shrinkage estimator of a covariance matrix as an alternative to the sample covariance matrix in the D-classification rule (D-rule in short). We find an asymptotic expression for misclassification rate of the regularized D-rule, when the sample size $n$ and the dimension $p$ both increase and their ratio $p∕n$ approaches a positive constant $\gamma$. In addition, we compare its misclassification rate to the standard D-rule under various settings via simulation.     

和谐致平之道--关于和平学的几点阐释

和平学可以分为"和平"和"研究"两个词。和平即是用非暴力的方式实现和平,研究则应是经验的、批判的和建设性的。减少暴力的方法有:寻找冲突的根源对症下药;去两极化和人性化;以和解方式治愈创伤结束暴力循环。当今世界主要冲突的根源是多方面的和复杂的,这就要求和平学研究应多关注深层次的文化和结构,同时应认识到和平学是跨国的而非国际间的,各国的和平学研究应该汇流到一起。     

The effects of trampling on assemblages of ground beetles (Coleoptera,Carabidae) in urban forests in Helsinki,Finland

The occurrence of carabid beetles in relation to trampling was examined in urban forest sites located in the city of Helsinki, southern Finland. The degree of wear of the forest floor was assessed and used as a measure of trampling intensity. In particular, we examined the following predictions: (1) carabid diversity should decrease with increasing trampling intensity, (2) mean body size of the dominating carabid species should decrease with increasing trampling intensity, and (3) opportunistic species should gain dominance in severely trampled sites. In total, 1,326 beetles representing 27 species were captured. The first prediction was not supported, as there was no correlation between species richness or Hill's N2 diversity index and trampling intensity. However, there was a positive correlation between number of carabids captured and trampling intensity of the site. The second hypothesis gained some support, as there was a marginally significant negative correlation between body size and trampling intensity. The hypothesis that opportunistic species should gain dominance in severely trampled sites was supported as one species was very dominant (Pterostichus melanarius, 60.0%) in the heavily trampled sites, while there were two equally and less dominant species in the less trampled sites. Individual species did show different responses to the effects of trampling, and the most sensitive forest species may not survive in the heavily trampled sites. We conclude that at the community level (e.g., species richness, diversity), the effects of trampling on carabids in urban forests are subtle, but impacts are pronounced for some sensitive species.