Rent Seeking and the Unveiling of 'De Facto' Institutions: Development and Colonial Heritage within Brazil

This paper analyzes the roots of variation in de facto institutions, within a constant de jure institutional setting. We explore the role of rent-seeking episodes in colonial Brazil as determinants of the quality of current local institutions, and argue that this variation reveals a de facto dimension of institutional quality. We show that municipalities with origins tracing back to the sugar-cane colonial cycle -- characterized by a polarized and oligarchic socioeconomic structure -- display today more inequality in the distribution of land. Municipalities with origins tracing back to the gold colonial cycle -- characterized by an over-bureaucratic and heavily intervening presence of the Portuguese state -- display today worse governance practices and less access to justice. The colonial rent-seeking episodes are also correlated with lower provision of public goods and lower income per capita today, and the latter correlation seems to work partly through worse institutional quality at the local level.

Discrimination of increases in the brightness of a flashing beacon

Human performance measured as function of reaction time required to discriminate change in beacon brightnes

Institutional Development and Colonial Heritage within Brazil

This paper analyzes the determinants of local institutions and distribution of political power within a constant 'macro-institutional' setting. We show that characteristics of Brazilian municipalities related to institutional quality and distribution of political power are partly inherited from the colonial histories experienced by different areas of the country. Municipalities with origins tracing back to the sugar-cane colonial cycle – characterized by a polarized and oligarchic socioeconomic structure – display today more inequality in the distribution of endowments (land). Municipalities with origins tracing back to the gold colonial cycle – characterized by a heavily inefficient presence of the Portuguese state – display today worse governance practices and less access to justice. The colonial rent-seeking episodes are also correlated with lower provision of public goods and lower income per capita.institutions, colonial heritage, rent-seeking, geography, Brazil

Wing Shape as an Indicator of Larval Rearing Conditions for Aedes albopictus and Aedes aegypti (Diptera: Culicidae)

Estimating a mosquito\u27s vector competence, or likelihood of transmitting disease, if it takes an infectious bloodmeal, is an important aspect of predicting when and where outbreaks of infectious diseases will occur. Vector competence can be affected by rearing temperature and inter- and intraspecific competition experienced by the individual mosquito during its larval development. This research investigates whether a new morphological indicator of larval rearing conditions, wing shape, can be used to distinguish reliably temperature and competitive conditions experienced during larval stages. Aedes albopictus (Skuse) and Aedes aegypti (L.) (Diptera: Culicidae) larvae were reared in low intraspecific, high intraspecific, or high interspecific competition treatments at either 22 or 32 degrees C. The right wing of each dried female was removed and photographed. Nineteen landmarks and 20 semilandmarks were digitized on each wing. Shape variables were calculated using geometric morphometric software. Canonical variate analysis, randomization multivariate analysis of variance, and visualization of landmark movement using deformation grids provided evidence that although semilandmark position was significantly affected by larval competition and temperature for both species, the differences in position did not translate into differences in wing shape, as shown in deformation grids. Two classification procedures yielded success rates of 26-49%. Accounting for wing size produced no increase in classification success. There seemed to be a significant relationship between shape and size. These results, particularly the low success rate of classification based on wing shape, show that shape is unlikely to be a reliable indicator of larval rearing competition and temperature conditions for Ae. albopictus and Ae. aegypti

Insect Cultural Services : How Insects Have Changed Our Lives and How Can We Do Better for Them

Funding: This research received no external funding. Data Availability Statement: No new data were created or analysed in this study. Data sharing is not applicable to this article.Peer reviewedPublisher PD