The post-Civil War American natural history craze spawned a new institution -- the natural history dealer -- that has failed to receive the historical attention it deserves. The individuals who created these enterprises simultaneously helped to promote and hoped to profit from the burgeoning interest in both scientific and popular specimen collecting. At a time when other employment and educational prospects in natural history were severely limited, hundreds of dealers across the nation provided encouragement, specimens, publication outlets, training opportunities, and (...) jobs for naturalists of all motivations and levels of expertise. This paper explores the crucial role that specimen dealers played in the larger natural history community. After briefly examining the development of local taxidermy shops in the mid-nineteenth century, it then traces the history of four large natural history dealerships established in the United States during the latter half of the century: Ward's Natural History Establishment, Frank Blake Webster's Naturalists' Supply Depot, Southwick & Jencks' Natural History Store, and Frank H. Lattin & Co. By the early twentieth century, changing tastes in interior design, the growth of the Audubon movement, and the dramatic expansion of alternate training and job opportunities for naturalists led many specimen dealers either to shift their emphasis or to shut their doors. (shrink)

Coalitions and alliances are core aspects of human behavior. All societies recognize alliances among communities, usually based in part on kinship and marriage. Aggression between groups is ubiquitous, often deadly, fueled by revenge, and can have devastating effects on general human welfare. Given its significance, it is surprising how little we know about the neurobiological and hormonal mechanisms that underpin human coalitionary behavior. Here we first briefly review a model of human coalitionary behavior based on a process of runaway social (...) selection. We then present several exploratory analyses of neuroendocrine responses to coalitionary social events in a rural Dominican community, with the objective of understanding differences between in-group and out-group competition in adult and adolescent males. Our analyses indicate: (1) adult and adolescent males do not elevate testosterone when they defeat their friends, but they do elevate testosterone when they defeat outsiders; (2) pre-competition testosterone and cortisol levels are negatively associated with strength of coalitionary ties; and (3) adult males usually elevate testosterone when interacting with adult women who are potential mates, but in a striking reversal, they have lower testosterone if the woman is a conjugal partner of a close friend. These naturalistic studies hint that reciprocity, dampening of aggression, and competition among friends and allies may be biologically embedded in unique ways among humans. (shrink)

The major competing statistical paradigms share a common remarkable but unremarked thread: in many of their inferential applications, different probability interpretations are combined. How this plays out in different theories of inference depends on the type of question asked. We distinguish four question types: confirmation, evidence, decision, and prediction. We show that Bayesian confirmation theory mixes what are intuitively “subjective” and “objective” interpretations of probability, whereas the likelihood-based account of evidence melds three conceptions of what constitutes an “objective” probability.

This study examines the family environments and hormone profiles of 316 individuals aged 2 months-58 years residing in a rural village on the east coast of Dominica, a former British colony in the West Indies. Fieldwork was conducted over an eight-year period (1988–1995). Research methods and techniques include radioimmunoassay of cortisol and testosterone from saliva samples (N=22,340), residence histories, behavioral observations of family interactions, extensive ethnographic interview and participant observation, psychological questionnaires, and medical examinations.Analyses of data indicate complex, sex-specific effects (...) of family environment on endocrine function. Male endocrine profiles exhibit greater sensitivity to presence of father than do female endocrine profiles. Father-absent males tend to have (a) low cortisol levels during infancy, (b) high or abnormal cortisol profiles during childhood and adolescence, and (c) high cortisol and low testosterone levels during adulthood compared with those of males raised with a resident father. These results indicate that early family environment has significant effects on endocrine response throughout male life histories. (shrink)

An extended period of childhood and juvenility is a distinctive aspect of human life history. This stage appears to be important for learning cultural, social, and ecological skills that help prepare the child for the adult socio-competitive environment. The unusual pattern of adrenarche in humans (and chimpanzees) may facilitate adaptive modification of the neurobiological mechanisms that underpin reproductive strategies. Longitudinal monitoring of DHEA/S in naturalistic context could provide important new insights into these aspects of child development.

Despite a consensus across the political spectrum that the problem of the chronically uninsured is in dire need of solution, little progress has been made. Public spending goes to topping up coverage for the elderly, already heavily subsidized under Medicare, or helping people temporarily without insurance because of international trade dislocations, so that it is clear that something is lacking in the case for significantly reducing the number of uninsured persons. In this paper I suggest that there have been two (...) missing ingredients: a strategy for breaking the political deadlock around this issue, and information about the benefits of coverage sufficient to persuade kindly but skeptical taxpayers that they should be willing to pay to help solve this problem. (shrink)

Despite a consensus across the political spectrum that the problem of the chronically uninsured is in dire need of solution, little progress has heen made. Public spending goes to topping up coverage for the elderly, already heavily subsidized under Medicare, or helping people temporarily without insurance because of international trade dislocations, so that it is clear that something is lacking in the case for significantly reducing the number of uninsured persons. In this paper I suggest that there have been two (...) missing ingredients: a strategy for breaking the political deadlock around this issue, and information about the benefits of coverage sufficient to persuade kindly but skeptical taxpayers that they should be willing to pay to help solve this problem.This article begins with a discussion of these two problems. It then outlines a strategy based on income-related or conditioned refundable tax credits for private and public insurance, coupled with a plan to assemble persuasive information that may move things forward. (shrink)

Employers must determine the types of health care plans to offer and also set employee premiums for each plan provided. Depending on the structure of the employee share of premiums across different health insurance plans, the incentives to choose one plan over another are altered. If employees know premiums do not fully reflect the risk differences among workers, such pricing can give rise to a so-called “death spiral” due to adverse selection. This paper uses longitudinal information from a natural experiment (...) in the management of health benefits for a large employer to explore the impact of moving from a fixed-dollar contribution policy to a partially risk-adjusted employer contribution policy. Our results show that implementing a significant risk adjustment had no discernable effect on adverse selection against the most generous indemnity insurance policy. This stands in stark contrast to previous studies, which have tended to estimate large impacts attributed to selection when employers move to a fixed-dollar policy from one with some risk adjustment. Further analysis suggests that previous studies, which appeared to detect plans in the throes of a death spiral, may instead have been reflecting an inexorable movement away from a non-preferred product, one that would have been inefficient for nearly all workers even in the absence of adverse selection. (shrink)