Intercommection Incentives of a Large Network Facing Multiple Rivals

This paper extends Cremer, Rey and Tirole’s analysis of whether a firm with the most installed-base customers, in a market exhibiting network externalities, gains by degrading interconnection with rivals that compete with it for new customers. We allow any number of rivals and consider both tipping equilibria and interior equlibria. Degrading interconnection can yield tipping away from the largest network even if its installed-base share exceeds one half. For all parameter values (including those that admit interior equilibria), a share above one half is necessary but not sufficient to ensure degradation is profitable. Greater scope for market expansion—a lower marginal cost or smaller installed-base relative to potential additional demand—makes profitable degradation less likely.Interconnection, Network Externalities, Exclusion

From manuscript catalogues to a handbook of Syriac literature: Modeling an infrastructure for Syriaca.org

Despite increasing interest in Syriac studies and growing digital availability of Syriac texts, there is currently no up-to-date infrastructure for discovering, identifying, classifying, and referencing works of Syriac literature. The standard reference work (Baumstark's Geschichte) is over ninety years old, and the perhaps 20,000 Syriac manuscripts extant worldwide can be accessed only through disparate catalogues and databases. The present article proposes a tentative data model for Syriaca.org's New Handbook of Syriac Literature, an open-access digital publication that will serve as both an authority file for Syriac works and a guide to accessing their manuscript representations, editions, and translations. The authors hope that by publishing a draft data model they can receive feedback and incorporate suggestions into the next stage of the project.Comment: Part of special issue: Computer-Aided Processing of Intertextuality in Ancient Languages. 15 pages, 4 figure

Maternal Filovirus Infection and Death from Marburg and Ravn Viruses: Highly Lethal to Pregnant Women and Their Fetuses Similar to Ebola Virus

Ebola virus and the marburgviruses are distinct filoviruses that share common clinical presentations and clinical management protocols. However, the marburgviruses are not as well known as is their close relative, Ebola virus, and are a much less frequent cause of human outbreaks. Marburg virus disease (MVD) is caused by two marburgviruses that are clinically indistinguishable—Marburg virus and Ravn virus. There is scant information available concerning MVD in pregnancy, but it appears clear that, similar to Ebola virus, MVD infection is associated with an extremely high maternal and fetal mortality rate. This chapter will examine what is known about Marburg and Ravn virus infections in pregnant women, their clinical outcomes, and the pathogenesis of MVD in experimental animal models of infection. These data will be compared with the more comprehensive information available regarding Ebola virus disease in pregnancy including its effects on pregnant women and the fetus

The PRECiSE 2 trial of certolizumab pegol, a new PEGylated anti-TNF agent, in the treatment of Crohn’s disease: An interview with David A Schwartz, 13 June 2007

David A SchwartzVanderbilt University Medical Center, Nashville, TN, USAContext: Certolizumab pegol (CDP 870) is a new anti-tumor necrosis factor (TNF) therapy currently in development for the treatment of Crohn’s disease, rheumatoid arthritis, and psoriasis. Certolizumab pegol is the first PEGylated biologic anti-TNF agent and has a high binding affinity for TNF. Dr. Schwartz was an investigator of the PRECiSE (PEGylated Antibody Fragment Evaluation in Crohn’s Disease Safety and Efficacy) 2 trial of certolizumab pegol in patients with Crohn’s disease.Keywords: certolizumab pegol, PRECiSE 2 trial, Crohn’s diseas

Pregnant and Out of Options: The Quest for Abortion in Latin America Due to the Zika Virus Pandemic

Latin America has some of the strictest abortion rules in the world, where the procedure is criminal in cases of rape, incest, or even to save the life of the mother. More than 97% of women in Latin America and the Caribbean live in countries where access to abortion is either restricted or banned altogether. As a result, unsafe abortion is widespread and causes 10% of all maternal deaths in the region. With the onset of the Zika virus pandemic in 2015, and the identification of the virus as causing poor pregnancy outcomes including fetal infection, microcephaly, and other malformations, there became an increased demand for abortions in Latin American countries. The response of many Latin American governments to Zika infection during pregnancy was to recommend that women avoid or postpone their pregnancies. These recommendations were not possible for many women at risk in the affected countries, especially those who were uneducated or living in poverty. As a result of the Zika pandemic, there has been an increased demand for abortion in many of the affected countries that, because of the clandestine and illegal nature of the procedure, carries the heightened risk for additional maternal morbidity and mortality