Creating illegal immigrants

This paper considers the prospects for successful implementation by governments of guest-worker programs that are based on an intended temporary presence of foreign workers. A means of enforcement of temporary presence is a penalty imposed for overstaying the permissible time period. Employers who are obliged to post bonds for their foreign workers are provided with an incentive to ensure that their workers leave at the end of their contractually specified stay. We consider the consequences of such a bond when foreign workers can leave legal employers for illegal employment. We also investigate the effectiveness of deferred payments to foreign workers as a means of discouraging transition from legal employment to illegal presence. In the final analysis, although the policy intention is a temporary stay, we conclude that if foreign workers do not wish to return home, there is an almost inevitability to the creation of a population of illegal immigrants (whose presence may be subsequently legalized). Received: 28 May 1997/Accepted: 6 July 1998     

Rent Control: An Economic Abomination

Rent control is a public policy which fails on both normative and positive economic grounds. In the former case, it violates all canons of equity, of both right (private property rights are sacrosanct) and left (it does not promote egalitarianism, rather, often, it enriches rich tenants and impoverishes poor landlords). In the latter, it leads to inefficiency, deterioration of rental housing, reduces incentives for upkeep and maintenance, reduces labor mobility, exacerbates landlord tenant relations, promotes housing abandonment and homelessness, and misallocates resources away from residential rental units. This sovietization of housing has effects similar to the sovietization of anything else: farming, factories, industry, forestry, whatever. This revised version was published online in August 2006 with corrections to the Cover Date.     

Great divides: Deceptive distinctions and rhetorical strategies in the VMI and citadel cases

Legitimation for the maintenance of privilege is often made by rhetorical strategies that appeal to often irrelevant but favored values of a group. The case for the continuance of the exclusion of women at two revered state-supported militarystyle colleges, The Virginia Military Institute (VMI) (in Virginia) and the Citadel (in South Carolina), was made by those institutions and their lawyers and expert witnesses by appeals to “rationality” which encompass unsupported stereotyped views and references to the value of historical precedent and the status quo. The view that males and females are basically different with respect to cognitive and emotional characteristics is employed in the rhetoric. Thus, in these institutions and in some others today (e.g., a new single sex public school) sex segregation is offered as a benefit not only to males but to females, who are regarded as unable to learn well in coeducational environments. The article notes that assumptions about basic cognitive and emotional differences are deceptive and are not supported by empirical evidence, and that the studies cited by advocates of sex segregation are either impaired methodologically or are irrelevant today. The article also explores the way in which such values as diversity and states' rights are employed in the rationales for segregation.     

Interpersonal distance preferences

The utility of various curvilinear comfort models of interpersonal distance was examined in a study employing subjects' responses to a broad range of videotaped, seated distances. Results obtained provided considerable support for these models. Intermediate distances were rated as more comfortable, preferable, and appropriate than more extreme close or far distances. This pattern of results was manifested for interaction situations involving both two- and four-person groups.This research was supported by Grants #HD-07045 and HD-8546-01 from the National Institute of Child Health and Human Development and by a NIH Biomedical Research Support grant 5S07 RR07087-12.     

Two-dimensional density estimation using smooth invertible transformations

We investigate the problem of estimating a smooth invertible transformation f when observing independent samples X₁,…,X_n∼P°f where P is a known measure. We focus on the two-dimensional case where P and f are defined on R². We present a flexible class of smooth invertible transformations in two dimensions with variational equations for optimizing over the classes, then study the problem of estimating the transformation f by penalized maximum likelihood estimation. We apply our methodology to the case when P°f has a density with respect to Lebesgue measure on R² and demonstrate improvements over kernel density estimation on three examples.     

The struggle over migration policy

We analyze the endogenous determination of migration quota, viewing it as an outcome of a two-stage political struggle between two interest groups: those in favor and those against the proposed migration quota. First, we compare the proposed policies of the two interest groups under random behavior of the government, with and without lobbying. We examine the effect of the status quo and government intervention in the proposal of the quota on its nature, assuming that, with and without government intervention, the uncertain approval of the proposal is the outcome of a lobbying contest between the two interest groups.

Min-Sum Bin Packing

We study min-sum bin packing (MSBP). This is a bin packing problem, where the cost of an item is the index of the bin into which it is packed. The problem is equivalent to a batch scheduling problem we define, where the total completion time is to be minimized. The problem is NP-hard in the strong sense. We show that it is not harder than this by designing a polynomial time approximation scheme for it. We also show that several natural algorithms which are based on well-known bin packing heuristics (such as First Fit Decreasing) fail to achieve an asymptotic finite approximation ratio, whereas Next Fit Increasing has an absolute approximation ratio of at most 2, and an asymptotic approximation ratio of at most 1.6188. We design a new heuristic that applies Next Fit Increasing on the relatively small items and adds the larger items using First Fit Decreasing, and show that its asymptotic approximation ratio is at most 1.5604.     

Differential Behavioral and Neural Profiles in Youth With Conduct Problems During Risky Decision‐Making

Neuroimaging work has examined neural processes underlying risk taking in adolescence, yet predominantly in low‐risk youth. To determine whether we can extrapolate from current neurobiological models, this functional magnetic resonance imaging study investigated risk taking and peer effects in youth with conduct problems (CP; N = 19) and typically developing youth (TD; N = 25). Results revealed higher real‐life risk taking, lower risky decisions, and no peer effects on a risk‐taking task in CP youth. CP youth showed greater ventral striatum (VS) activity during safe than risky decisions, whereas TD youth showed greater VS activation during risky decisions. Differential VS activity explained higher real‐life risk taking in CP youth. Findings provide preliminary evidence that risk‐taking behavior in youth with CD problems is characterized by differential neural patterns.     

Erratum to: Beyond the urban stream syndrome: organic matter budget for diagnostics and restoration of an impaired urban river

Urban Ecosystems - This article was unintentionally published twice in this journal, by the same authors.     

Beliefs about the etiology of homosexuality and about the ramifications of discovering its possible genetic origin

Homosexuality is viewed by many as a social problem. As such, there is a keen interest in elucidating the origins of homosexuality among many scholars, from anthropologists to zoologists, from psychologists to theologians. Research has shown that those who believe sexual orientation is inborn are more likely to have tolerant attitudes toward gay men and lesbians, whereas those who believe it is a choice have less tolerant attitudes. The current qualitative study used in-depth, open-ended telephone interviews with 42 White and 44 Black Americans to gain insight into the public's beliefs about the possible genetic origins of homosexuality. Along with etiological beliefs (and the sources of information used to develop these beliefs), we asked respondents to describe the benefits and dangers of scientists discovering the possible genetic basis for homosexuality. We found that although limited understanding and biased perspectives likely led to simplistic reasoning concerning the origins and genetic basis of homosexuality, many individuals appreciated the complex and interactive etiological perspectives. These interactive perspectives often included recognition of some type of inherent aspect, such as a genetic factor(s), that served as an underlying predisposition that would be manifested after being influenced by other factors such as choice or environmental exposures. We also found that beliefs in a genetic basis for homosexuality could be used to support very diverse opinions including those in accordance with negative eugenic agendas.