Remittances and inequality: a dynamic migration model

We develop a model to study the effects of migration and remittances on inequality in the origin communities. While wealth inequality is shown to be monotonically reduced along the time-span, the short- and the long-run impacts on income inequality may be of opposite signs, suggesting that the dynamic relationship between migration/remittances and inequality may well be characterized by an inverse U-shaped pattern. This is consistent with the findings of the empirical literature, yet offers a different interpretation from the usually assumed migration network effects. With no need to endogenize migration costs through the role of migration networks, we generate the same result via intergenerational wealth accumulation

Remittances and inequality: A dynamic migration model

We develop a model to study the effects of migration and remittances on inequality in the origin communities. While wealth inequality is shown to be monotonically reduced along the time-span, the short- and the long-run impacts on income inequality may be of opposite signs, suggesting that the dynamic relationship between migration/remittances and inequality may well be characterized by an inverse U-shaped pattern. This is consistent with the findings of the empirical literature, yet offers a different interpretation from the usually assumed migration network effects. With no need to endogenize migration costs through the role of migration networks, we generate the same result via intergenerational wealth accumulation.Migration, remittances, inequality

An instability criterion for a finite amplitude localized disturbance in a shear flow of electrically conducting fluids

The stability of shear flows of electrically conducting fluids, with respect to finite amplitude three-dimensional localized disturbances is considered. The time evolution of the fluid impulse integral, characterizing such disturbances, for the case of low magnetic Reynolds number is obtained by integrating analytically the vorticity equation. Analysis of the resulted equation reveals a new instability criterion.Comment: 10 pages in LaTex, no figures, accepted in Phys. Fluid

An arithmetic Hilbert-Samuel theorem for singular hermitian line bundles and cusp forms

We prove an arithmetic Hilbert-Samuel type theorem for semi-positive singular hermitian line bundles of finite height. In particular, the theorem applies to the log-singular metrics of Burgos-Kramer-K\"uhn. Our theorem is thus suitable for application to some non-compact Shimura varieties with their bundles of cusp forms. As an application, we treat the case of Hilbert modular surfaces, establishing an arithmetic analogue of the classical result expressing the dimensions of spaces of cusp forms in terms of special values of Dedekind zeta functions

Alzheimers: The Disease of the Century

Alzheimer's disease is the major cause of dementia in the United States, with spending in the range of $100 billion annually. It affects 5 to 7 percent of people over 65 years of age and 20 to 40 percent over 80, and is estimated to be the fourth to fifth most common cause of death in the United States. Concerted research efforts in the clinical and basic neurosciences in the last 30 years have resulted in marked advances in our understanding of the clinical course and mechanisms of Alzheimer's disease as well as new therapeutic directions. This review provides a short history of the progress that has been made in Alzheimer's disease research during this time, and identifies some of the seminal discoveries and insights that contributed to this progress

The Life of the Parties: Activists in Presidential Politics

Commentators, especially since the Democratic party reforms following 1968, have expressed serious concerns about the role of party activists in the American political system. Have they become so concerned with ideological purity that they are unable to nominate strong candidates? Are activists loyal only to particular interest groups, with little concern for the parties as institutions? Are the reformed nominating procedures open to takeover by new activists, who exit the party immediately after the presidential nominations fight? With such an unrepresentative set of activists, can parties adjust to changing environments? Based on a survey of more than 17,000 delegates to state presidential nominating conventions in eleven states in 1980, this pathbreaking book addresses these questions in a comprehensive way for the first time. Heretofore most of the generalizations about party activists in the presidential nomination process have been based on studies of national convention delegates, in particular those attending the 1972 conventions. But those delegates were atypical activists, as this book shows. The state of the activist stratum of the parties differs from what many of the critics have suggested. Ronald B. Rapoport and John McGlennon are associate professors of government at the College of William and Mary. Alan I. Abramowitz is an associate professor of political science at the State University of New York, Stony Brook. The research presented here is impressive and sophisticated in its methods. . . The only comprehensive study of caucus delegates that I have seen. —Perspective A significant attempt to bring new and extensive data to the study of party activists and cadres. —Political Science Quarterlyhttps://uknowledge.uky.edu/upk_political_science_american_politics/1028/thumbnail.jp