Kernel Method Starting with Half-Normal Detection Function for Line Transect Density Estimation

In this article, we introduce the nonparametric kernel method starting with half-normal detection function using line transect sampling. The new method improves bias from O(h ²), as the smoothing parameter h → 0, to O(h ³) and in some cases to O(h ⁴). Properties of the proposed estimator are derived and an expression for the asymptotic mean square error (AMSE) of the estimator is given. Minimization of the AMSE leads to an explicit formula for an optimal choice of the smoothing parameter. Small-sample properties of the estimator are investigated and compared with the traditional kernel estimator by using simulation technique. A numerical results show that improvements over the traditional kernel estimator often can be realized even when the true detection function is far from the half-normal detection function.     

Expanding Carceral Markets: Detention Facilities,ICE Contracts,and the Financial Interests of Punitive Immigration Policy

On the night of November 8, 2016, once election results showed an almost certain presidential victory for Donald Trump, private prison stock values increased. Trump’s harsh anti-immigrant campaign rhetoric, followed by his attempted crackdown on sanctuary cities (and immigrants more generally), had the potential to expand the carceral market to greater shares of undocumented immigrants. We develop a theory of carceral market expansion, arguing that private actors seek to expand carceral markets—for profit—just as in any other market. This paper examines whether private companies, like Core Civic and GEO, that contract with Immigration Customs and Enforcement (ICE) to operate detention facilities exert influence over federal immigration legislation in the 113th and 114th Congresses. Specifically, we examine (1) whether campaign donations made by private prison companies and other contractors to legislators (carceral lobbying hypothesis), and (2) having a privately owned or managed ICE detention facility in a legislator’s district (carceral representation hypothesis) increases the probability that legislators will co-sponsor more harsh immigration legislation in the U.S. states. We find strong support for the carceral representation hypothesis but limited to no support for the carceral lobbying hypothesis. Implications are discussed.     

A bias-corrected histogram estimator for line transect sampling

The classical histogram method has already been applied in line transect sampling to estimate the parameter f(0), which in turns is used to estimate the population abundance D or the population size N. It is well know that the bias convergence rate for histogram estimator of f(0) is o(h²) as h → 0, under the shoulder condition assumption. If the shoulder condition is not true, then the bias convergence rate is only o(h). This paper proposed two new estimators for f(0), which can be considered as modifications of the classical histogram estimator. The first estimator is derived when the shoulder condition is assumed to be valid and it reduces the bias convergence rate from o(h²) to o(h³). The other one is constructed without using the shoulder condition assumption and it reduces the bias convergence rate from o(h) to o(h²). The asymptotic properties of the proposed estimators are derived and formulas for bin width are also given. The finite properties based on a real data set and an extensive simulation study demonstrated the potential practical use of the proposed estimators.     

Organizations and the structure of culture

Recent work emphasizes how organizations and organizing are suffused by culture. Ignored, however, is the question of how organizations and organizing shape cultural understandings. In this paper, we draw attention to how organizations impact the creation, maintenance, and matching of cultural associations: The “structure of culture.” Cultural associations are distributed understandings of “what goes with what,” diffused via their co-adoption by individual and corporate actors. We argue that the process of associative diffusion is heavily influenced by organizational forms, routines, and operations. While organizations shape culture production, they likewise shape resulting associations between cultural items, actively modifying the structure of culture. We conclude that the role of organizations in shaping the structure and dynamics of culture should be a central topic of study moving forward.     

A Motivational Theory of Roles,Rewards, and Institutions

In this paper, we attempt to rehabilitate the notion of role by linking sociological role theory to recent work on motivational, affective, and cognitive neuroscience specifying the internal mechanisms behind motivated action. We argue that there is nothing inherently problematic or retrogressive in the idea of “role,” once its link to a purely normative account of motivated action is severed. Instead, by conceptualizing roles as emerging and persisting around structured reward systems, we are able to incorporate contemporary motivational science such that rewards become the proximate causal mechanisms currently missing in role theory. Consequently, a key implication of our argument is that the best way to link role, action, and structures is by reviving the idea of institutions as literal reward systems, which allows us to envision roles as the mechanisms via which the pursuit and delivery of rewards and goal-objects are routinized. Implications for a motivational theory of roles, rewards, and institutions is discussed.