The communal/exchange distinction and some implications for understanding justice in families

This article briefly reviews 10 years of research on a distinction between communal and exchange norms. Communal norms dictate benefits should be given in response to the other's needs. Exchange norms dictate benefits should be given in response to specific benefits received in the past or with the expectation of receiving specific benefits in the future. Choice of norms is shown to be influenced by the type of relationship desired or existing between two people. Evidence of chronic individual differences in tendencies to follow communal and to follow exchange norms in relationships is also presented. We argue that most people believe that communal norms should be followed in family relationships and we outline implications of the research reviewed for understanding justice in the family. Implications of (i) behavior in accord with exchange norms (e.g., quick repayment of benefits received, keeping track of individual inputs into joint tasks), (ii) behavior in accord with communal norms (e.g., helping, expressing emotion) and (iii) individual differences in relationship orientations are discussed.     

The Influence of Clothing and Wrapping on Carcass Decomposition and Arthropod Succession During the Warmer Seasons in Central South Africa*

Abstract: The influence of clothing and wrapping on carcass decomposition and arthropod succession was investigated to provide data to enable estimated postmortem interval in homicide investigations. Six pig carcasses, Sus scrofa, were divided into three sample groups, each with a clothed carcass wrapped and a carcass wrapped with no clothes. Two more carcasses, one with no clothes or wrapping, the other with clothes and no wrapping were used as controls. The clothed or wrapped carcasses had larger visible maggot masses, which moved more freely and these carcasses took longer to dry out. The blow fly maggot masses were dominated by Chrysomya marginalis and Chrysomya albiceps. Oviposition occurred simultaneously on all carcasses. High temperatures in one case caused significant maggot mortality. The Coleoptera community was dominated by Silphidae, Thanathopilus micans larvae, Dermestidae, Dermestes maculatus adults and larvae, and Cleridae, Necrobia rufipes.     

Urban crime rates and the changing face of immigration: Evidence across four decades

Research has shown little support for the enduring proposition that increases in immigration are associated with increases in crime. Although classical criminological and neoclassical economic theories would predict immigration to increase crime, most empirical research shows quite the opposite. We investigate the immigration-crime relationship among metropolitan areas over a 40 year period from 1970 to 2010. Our goal is to describe the ongoing and changing association between immigration and a broad range of violent and property crimes. Our results indicate that immigration is consistently linked to decreases in violent (e.g., murder) and property (e.g., burglary) crime throughout the time period.     

An Independent Central Bank and an Independent Monetary Policy: The Role of the Government Budget—The Case of Poland 1924–26

Poland's 1924 stabilization plan created, as measured by contemporary criteria, an independent central bank. The stabilization's success was undermined by a fiscal disequilibrium when a capital levy failed to raise revenue. The Polish government covered the revenue shortfall by exploiting the right of the state to issue subsidiary coins. Although central bank independence was not compromised, Poland did not have an independent monetary policy. When the fiscal disequilibrium was corrected in 1926, the central bank gained complete control over monetary policy. Thus, a balanced budget may be more important to achieving price stability than arrangements to foster central bank independence.     

Campaigns and the Selection of Policy-Seeking Representatives

Can voters learn meaningful information about candidates from their electoral campaigns? As with job market hiring, voters, like employers, cannot know the productivity of candidates, especially challengers, when they elect them. The real productivity of representatives only reveals itself after the election. We explore if the information revealed during the “hiring process” is a good signal of the legislative effort of elected representatives. In the incomplete information environment of election campaigns, candidates should turn to credible signals to indicate their “type” to voters. Campaigns—and campaigning—are means by which candidates can, in principle, signal their motivations to voters. Is a candidate’s behavior on the campaign trail informative about his or her behavior and effort as a legislator? Does it, for example, reveal whether a candidate will be more hard working and legislatively active? Using evidence from the European Parliament, we show that campaign activity prior to the election is not related to policy-seeking behavior in the legislature post-election. The finding also holds in two national-level settings and across a variety of measures of legislative effort. Those who campaign harder do seem more likely to win the election, but campaign effort seems to provide a poor guide to what the winner does once elected.     

The Contribution of Body Mass and Volume of Distribution to the Estimated Uncertainty Associated with the Widmark Equation

The Widmark equation is used forensically for the determination of the amount of ethanol (alcohol) that may have been consumed and also to determine the blood alcohol concentration (BAC) of an individual at a specific time. It is important to be able to estimate the uncertainty associated with Widmark equations. To date, there has been no detailed determination of contribution to the final uncertainty of Widmark calculations of the volume of distribution of ethanol (V_d), using anthropometric equations, or the contribution of an individual’s body mass. Using published data, published literature, and freedom of information data, we determined that the variability (%CV) associated with V_d was ~10% (Watson et al. and Forrest anthropometric equations) and that the %CV associated with estimated body mass was ~15% compared to ~3% when body mass was directly measured. These data allow an estimation of the overall uncertainty of Widmark calculations using general error propagation. The estimated total uncertainty for BAC calculations increased from ~11% (volume consumed) and ~22% (BAC) to ~19% (volume consumed) and ~37% (BAC) when using measured body mass compared to estimated body mass. These results demonstrate that forensic practitioners should be mindful of the increase in estimated uncertainty in calculated Widmark equation results when estimated body mass is used rather than measured body mass. These data further improve the knowledge around the uncertainty of results calculated with the Widmark equation.