This article develops a statistic for testing the null of a linear unit root process against the alternative of a stationary exponential smooth transition autoregressive model. The asymptotic distribution of the test is shown to be nonstandard but nuisance parameter-free and hence critical values are obtained by simulations. Simulations show that the proposed statistic has considerable power under various data generating scenarios. Applications to real exchange rates also illustrate the ability of our test to reject null of unit root when some of the alternative tests do not. 相似文献
This article examines several goodness-of-fit measures in the binary probit regression model. Existing pseudo-R2 measures are reviewed, two modified and one new pseudo-R2 measure are proposed. For the probit regression model, empirical comparisons are made for different goodness-of-fit measures with the squared sample correlation coefficient of the observed response and the predicted probabilities. As an illustration, the goodness-of-fit measures are applied to a “paid labor force” data set. 相似文献
We interpret solution rules on a class of simple allocation problems as data on the choices of a policy maker. We analyze conditions under which the policy maker’s choices are (i) rational (ii) transitive-rational, and (iii) representable; that is, they coincide with maximization of a (i) binary relation, (ii) transitive binary relation, and (iii) numerical function on the allocation space. Our main results are as follows: (i) a well-known property, contraction independence (a.k.a. IIA) is equivalent to rationality; (ii) every contraction independent and other-c monotonic rule is transitive-rational; and (iii) every contraction independent and other-c monotonic rule, if additionally continuous, can be represented by a numerical function. 相似文献
Retracing the philosophical origins and initial usage of habitus by Bourdieu to account for the historical disjuncture wrought by the Algerian war of national liberation and the postwar modernization of the French countryside allows us to clear up four recurrent misunderstandings about the concept: (1) habitus is never the replica of a single social structure but a dynamic, multiscalar, and multilayered set of schemata subject to ‘permanent revision’ in practice; (2) habitus is not necessarily coherent and unified but displays varying degrees of integration and tension; (3) because it is not always congruent with the cosmos in which it evolves, habitus is suited to analysing crisis and change no less than cohesion and perpetuation; but (4) it is not a self‐sufficient mechanism for the generation of action: the dissection of dispositions must always proceed in close connection with the mapping of the system of positions that alternately excite, suppress, or redirect the socially constituted capacities and inclinations of the agent. Crucially, in Bourdieu's hands, habitus is not an abstract concept issued from and aimed at theoretical disquisition, but a stenographic manner of designating a research posture that puts the genetic mode of thinking at the heart of social analysis. 相似文献
When and how do anti-system religious parties become incorporated into the political system of their countries? In recent decades, social scientists have sought answers to this question within the framework of the moderation literature. While moderation theory identifies key factors that influence party leaders’ willingness to seek political incorporation, it is less successful in explaining the contingent outcome of the incorporation process. This article develops an alternative analytical framework for the study of political incorporation grounded in social performance theory. Through a case study of Islamic parties in Turkey between 1994 and 2011, the author demonstrates that political incorporation is as much a function of successful cultural performances on the public stage as the right alignment of institutional incentives and sanctions. As a result of the Justice and Development Party leaders’ successful projection of a mainstream political identity between 2002 and 2011, secularist state elites in Turkey failed to establish legitimate grounds for a political intervention, which in turn provided the party with the time and opportunity to remove the institutional barriers to its incorporation. 相似文献
In order to decrease the occurrence of social exclusion in adolescence, we need to better understand how adolescents perceive and behave toward peers involved in exclusion. We examined the role of friendships in treatment of perpetrators and victims of social exclusion. Eighty‐nine participants (aged 9–16) observed exclusion of an unfamiliar peer (victim) by their best friend and another unfamiliar peer. Subsequently, participants could give up valuable coins to altruistically punish or help peers. Results showed that participants altruistically compensated victims and punished unfamiliar excluders, but refrained from punishing their friends. Our findings show that friendship with excluders modulates altruistic punishment of peers and provide mechanistic insight into how friendships may influence treatment of peers involved in social exclusion during adolescence. 相似文献
In this paper we introduce a new biased estimator for the vector of parameters in a linear regression model and discuss its properties. We show that our new biased estimator is superior, in the mean square error(mse) sense, to the ordinary least squares (OLS) estimator, the ordinary ridge regression (ORR) estimator and the Liu estimator. We also compare the performance of our new biased estimator with two other special Liu-type estimators proposed in Liu (2003). We illustrate our findings with a numerical example based on the widely analysed dataset on Portland cement. 相似文献
Multiprocessor open shop makes a generalization to classical open shop by allowing parallel machines for the same task. Scheduling of this shop environment to minimize the makespan is a strongly NP-Hard problem. Despite its wide application areas in industry, the research in the field is still limited. In this paper, the proportionate case is considered where a task requires a fixed processing time independent of the job identity. A novel highly efficient solution representation is developed for the problem. An ant colony optimization model based on this representation is proposed with makespan minimization objective. It carries out a random exploration of the solution space and allows to search for good solution characteristics in a less time-consuming way. The algorithm performs full exploitation of search knowledge, and it successfully incorporates problem knowledge. To increase solution quality, a local exploration approach analogous to a local search, is further employed on the solution constructed. The proposed algorithm is tested over 100 benchmark instances from the literature. It outperforms the current state-of-the-art algorithm both in terms of solution quality and computational time.