A key to the New World species of holostipous Lejeuneaceae

A synopsis and key emphasizing vegetative characters are provided for the 967species (in 36 genera) of Lejeuneaceae with undivided underleaves recorded from the New World

Threatened bryophytes of the neotropical rain forest : a status report

Tropical deforestation, inevitably, leads to the local loss of bryophyte species. Recent studies show that the degree of species loss may vary considerably and depends on the scale or amount of habitat change that has occurred. Predictably, the shade epiphytes are most seriously affected by disturbance. An estimated 10% of the bryophyte species of neotropical rain forests are under threat. Based on data from recent monographs, a first list of 19 endangered and 27 rare species of these forests is presented. Critical areas for threatened species include Costa Rica and Panama, the Greater Antilles, the Chocó, southeastern Brazil, and parts of Amazonia. Protection of as much as possible of the remaining natural rain forest area seems the best approach to the conservation of the tropical bryophyte flora

Diversity and distribution of Asian Lejeuneaceae subfamily Ptychanthoideae

A synopsis is provided of 88 species in 17 genera currently recognized in Lejeuneaceae subfamily Ptychanthoideae sensu lato (including Nipponolejeunea) of Asia. Taxonomic novelties include Thysananthus flavescens (Hatt.) comb. nov. (for Mastigolejeunea flavescens (Hatt.) Mizut.), Spruceanthus macrostipulus (Steph.) comb. nov. (for Archilejeunea macrostipula (Steph.) Verd.) and the reduction of Platylejeunea Mizut. to synonymy under Lopholejeunea

Endogenous Reversals of Fortune

The phenomenon of systemic changes in the fortunes of social groups is hard to reconcile with traditional macroeconomic models of intergenerational mobility. This paper, therefore, proposes a theory of endogenous reversal of fortune, whereby instilling strict work norms is an instrument to address moral hazard in poor families more so than in rich families, which is consistent with empirical regularities pertaining to work attitudes. The mechanism implies that hard-working children of the poor may eventually overtake leisure-prone children of the rich. This evolution, in particular, of work norms, is endogenously determined and is, therefore a better explanation of the rise and the fall of population groups than existing theories that rely on exogenous ability variations.work norms, intergenerational income mobility

The Political Economy of Sustainable Federations

This paper studies a constitutional framework that enables sustainable federative agreements. In the model, districts decide on local policies and envision the possibility of entering a federation. Focusing on rules for legislative bargaining in the federation, I find that a non-egalitarian bargaining rule, which assigns policy making power to one of the district's representatives is welfare inferior to the decentralized status quo. In contrast, under an egalitarian bargaining procedure, federation yields a welfare superior outcome. The analysis indicates the desirability of making such egalitarian bargaining rules credible.

The political economy of public spending on education, inequality, and growth

Public provision of education has often been perceived as universal and egalitarian, but in reality it is not. Political pressure typically results in incidence bias in favor of the rich. The author argues that the bias in political influence resulting from extreme income inequalities is particularly likely to generate an incidence bias, which we call social exclusion. This may then lead to a feedback mechanism whereby inequality in the incidence of public spending on education breeds higher income inequality, thus generating multiple equilibria: with social exclusion and high inequality; and with social inclusion and relatively low inequality. The author also shows that the latter equilibrium leads to higher long-run growth than the former. An extension of the basic model reveals that spillover effects among members of social groups differentiated by race or ethnicity may reinforce the support for social exclusion.Public Health Promotion,Environmental Economics&Policies,Decentralization,Economic Theory&Research,Health Monitoring&Evaluation,Inequality,Poverty Assessment,Governance Indicators,Achieving Shared Growth,Economic Theory&Research

Sobre los determinantes y efectos de la influencia de politica (On the Determinants and Effects of Political Influence)

En este trabajo se emplea una encuesta de gran alcance entre empresas de varios países para evaluar su influencia en las políticas oficiales. Se halló que la influencia guarda una relación con empresas más grandes propiedad del Estado que tienen un alto grado de concentración de la propiedad. Por el contrario, la tenencia foránea tiene escasa importancia. También se descubrió que la medida en que se considera que las políticas gubernamentales y la legislación entorpecen el crecimiento de las empresas disminuye junto con la influencia política e, independientemente, junto con el nivel de calidad institucional del país. (Disponible en inglés)

Desigualdad, instituciones e informalidad

(Disponible en idioma inglés únicamente) En este trabajo se presentan la teoría y los elementos de prueba de los factores determinantes del tamaño del sector informal. Proponemos un modelo teórico simple en el que el tamaño del sector informal guarda una relación negativa con la calidad de las instituciones y una relación positiva con la desigualdad del ingreso. A continuación se validan empíricamente esas predicciones empleando diversas variables representativas del tamaño del sector informal, la desigualdad del ingreso y la calidad de las instituciones. Se muestra que los resultados son valederos con respecto a una variedad de especificaciones econométricas.

Educational expansion : evidence and interpretation

The authors document the vast expansion of schooling over the past several decades, as well as convergence in schooling measures across countries. They make the observation that poor countries today have higher average education levels than countries at the same level of economic development had in the past. They propose a simple model that suggests that these trends can be attributed to the intertemporal expansion of the world technological frontier, which enhances the demand for schooling. Their empirical analysis supports the view that educational expansion has occurred because of the increase in demand, especially in open economies, and not because of cost-reducing improvements in the education sector.Teaching and Learning,Decentralization,Labor Policies,Economic Theory&Research,Environmental Economics&Policies,Environmental Economics&Policies,Achieving Shared Growth,Economic Theory&Research,Teaching and Learning,Inequality