Land tenure and the adoption of agricultural technology in Haiti:

There has long been an active debate in Haiti - as in many other developing countries - over whether or not the customary tenure system constrains technology adoption and agricultural development, and whether cadaster and land titling should be national priorities. This paper contributes to this debate by reviewing and interpreting the body of literature and new empirical evidence concerning the relationship between land tenure and the adoption of technology in rural Haiti. The findings suggest that (a) formal title is not necessarily more secure than informal arrangements, (b) informal arrangements based on traditional social capital resources assure affordable and flexible access to land for most people, and (c) perceived stability of access to land-via stability of personal and social relationships-is a more important determinant of technology adoption than mode of access. The paper concludes that there is no definitive relationship between tenure and technology adoption by peasants; peasants are preoccupied more by political and economic insecurity than insecure tenure; and rather than tinkering with formalizing tenure, policy makers should prioritize other more fundamental rural sector reforms. The paper ends by considering some of the implications for theory and suggests several avenues for future research on land policy.

Convictions Based on Character: An Empirical Test of Other-Acts Evidence

Despite the time-honored judicial principle that “we try cases, rather than persons,” courts routinely allow prosecutors to use defendants’ prior, unrelated bad acts at trial. Courts acknowledge that jurors could improperly use this other acts evidence as proof of the defendant’s bad character. However, courts theorize that if the other acts are also relevant for a permissible purpose—such as proving the defendant’s identity as the perpetrator of the charged crime—then a cautionary instruction will cure the problem, and any prejudice is “presumed erased from the jury’s mind.” We put this judicial assumption to an empirical test. We recruited 249 participants to serve as mock jurors in a hypothetical criminal case. After reading the identical case summary, jurors were randomly assigned to one of two groups, each of which received different evidence on the issue of identity. Group A received conclusive proof, in the form of a stipulation, that if a crime was committed, the defendant was the one who committed it. Group A convicted at the rate of 33.1%. Group B received less certain evidence of identity in the form of the defendant’s somewhat similar, prior conviction, along with a cautionary instruction that this other act may not be used as evidence of the defendant’s character. Group B convicted at the much higher rate of 48.0%. The difference in conviction rates is statistically significant. Further, jurors in Group B were also more confident in their verdicts despite receiving less certain evidence of guilt and a cautionary instruction. These empirical findings demonstrate that cautionary instructions are not effective, and jurors will use other-acts evidence for impermissible purposes including, for example, the forbidden character inference. Given this, we discuss several pretrial strategies for defense counsel to limit the prejudicial impact of other-acts evidence

Impact of external sources of infection on the dynamics of bovine tuberculosis in modelled badger populations

Background The persistence of bovine TB (bTB) in various countries throughout the world is enhanced by the existence of wildlife hosts for the infection. In Britain and Ireland, the principal wildlife host for bTB is the badger (Meles meles). The objective of our study was to examine the dynamics of bTB in badgers in relation to both badger-derived infection from within the population and externally-derived, trickle-type, infection, such as could occur from other species or environmental sources, using a spatial stochastic simulation model. Results The presence of external sources of infection can increase mean prevalence and reduce the threshold group size for disease persistence. Above the threshold equilibrium group size of 6–8 individuals predicted by the model for bTB persistence in badgers based on internal infection alone, external sources of infection have relatively little impact on the persistence or level of disease. However, within a critical range of group sizes just below this threshold level, external infection becomes much more important in determining disease dynamics. Within this critical range, external infection increases the ratio of intra- to inter-group infections due to the greater probability of external infections entering fully-susceptible groups. The effect is to enable bTB persistence and increase bTB prevalence in badger populations which would not be able to maintain bTB based on internal infection alone. Conclusions External sources of bTB infection can contribute to the persistence of bTB in badger populations. In high-density badger populations, internal badger-derived infections occur at a sufficient rate that the additional effect of external sources in exacerbating disease is minimal. However, in lower-density populations, external sources of infection are much more important in enhancing bTB prevalence and persistence. In such circumstances, it is particularly important that control strategies to reduce bTB in badgers include efforts to minimise such external sources of infection

Truth or Doubt? An Empirical Test of Criminal Jury Instructions

Part I of this article briefly discusses the concept of proof beyond a reasonable doubt, along with its importance to individuals and society generally. Part II surveys some of the truth-related language used in multiple state and federal jurisdictions. It also examines the constitutional problems created by this language and discusses courts\u27 inadequate responses to these problems. Part III explains our controlled experiment, including our hypotheses, study design, and empirical findings. Part IV discusses these findings and their significance and argues that courts should immediately terminate their use of truth-based jury instructions so that our constitutional guarantees are fulfilled. Finally, Part V discusses the possible limitations of our study and considers ways that researchers may choose to address these issues in future studies

Capital Gains, Dividends, and Taxes: Market Reactions to Tax Changes

ABSTRACT The purpose of this study is to examine the effect of a capital gains tax reduction on the stock price of firms that have not historically paid a dividend. If markets are semi-strong-form efficient, one would expect that the market price would have already adjusted prior to the day the announcement was made, assuming no new information was included in the announcement. If markets have not already incorporated the information, there would be a possibility for abnormal returns from investing in the stocks on the date of the announcement. This paper studies the returns from companies prior to, and subsequent to, the capital gains tax reduction announcement date and compares the price changes of non-dividend paying companies to those of similar firms that have historically paid dividends. The a priori expectation of the study is that the majority of a change in prices will take place prior to the announcement date as investors anticipate the likelihood of passage by the Congress and the President

An FeLoBAL Binary Quasar

In an ongoing infrared imaging survey of quasars at Keck Observatory, we have discovered that the z=1.285 quasar SDSS J233646.2-010732.6 comprises two point sources with a separation of 1.67". Resolved spectra show that one component is a standard quasar with a blue continuum and broad emission lines; the other is a broad absorption line (BAL) quasar, specifically, a BAL QSO with prominent absorption from MgII and metastable FeII, making it a member of the ``FeLoBAL'' class. The number of known FeLoBALs has recently grown dramatically from a single example to more than a dozen, including a gravitationally lensed example and the binary member presented here, suggesting that this formerly rare object may be fairly common. Additionally, the presence of this BAL quasar in a relatively small separation binary adds to the growing evidence that the BAL phenomenon is not due to viewing a normal quasar at a specific orientation, but rather that it is an evolutionary phase in the life of many, if not all, quasars, and is particularly associated with conditions found in interacting systems.Comment: AASTEX 13 pp., 4 figs; accepted by ApJ Letter

Pelvic ventral hernia repair in a pygopagus conjoint twin

Pelvic ventral hernia repair in a surviving conjoint twin with multiple congenital anomalies that make surgery a challenge. Conjoint twins are a rare. The incidence is reported to be in the range of 1/50 000 to 1/100 000 live births. Of the conjoint twins, 40% are stillborn and an additional one-third die within 24 h of birth. Those who survive through birth and surgical separation may present later in life with a wide range of complex congenital malformations. There are no reports on hernia incidence or hernia repair in surviving conjoint twins.Keywords: conjoint twin, incisional hernia, pelvic hernia, ventral herni

A multispecies model for the transmission and control of mastitis in dairy cows

Mastitis in dairy cows is a significant economic and animal welfare issue in the dairy industry. The bacterial pathogens responsible for infection of the mammary gland may be split into two main categories: major and minor pathogens. Infection with major pathogens generally results in clinical illness or strong inflammatory responses and reduced milk yields, whereas minor pathogen infection is usually subclinical. Previous investigations have considered the transmission of these pathogens independently. Experimental evidence has shown cross-protection between species of pathogens. In this study a mathematical model for the coupled transmission of major and minor pathogens along with their interaction via the host was developed in order to consider various methods for controlling the incidence of major pathogen infection. A stability analysis of the model equilibria provides explanations for observed phenomena and previous decoupled modelling results. This multispecies model structure has provided a basis for quantifying the extent of cross-protection between species and assessing possible control strategies against the disease

Single-photon threshold photoionization of NO

Single‐photon threshold photoionization spectra for jet‐cooled NO have been measured for the v^+=0 and 1 vibrational levels of the X ^1Σ^+ ground state of NO^+. The NO^+ rotational state distribution for the v^+=0 level is shown to be perturbed by nearby autoionizing levels, whereas the v^+=1 level exhibits a cation rotational distribution which is in near quantitative agreement with calculated spectra near threshold. Only small changes in total angular momentum are observed (‖ΔJ‖=‖J^+ − J‘‖≤5/2) even though a wide range of photoelectron angular momenta (l=0–3) are predicted to contribute to the near‐threshold photoelectron continua. The present results are also discussed in light of recently published two‐photon threshold photoionization spectra of NO which exhibit nearly identical NO^+ rotational state distributions