This article analyzes the technical efficiency, the Total Factor Productivity (TFP) and the technological gap in public security services in Brazilian States. The order-m frontier is used for results estimation. The TFP variation is built by decomposing the Malmquist productivity index into...

We select one firm from a large data set of firms and study its internal economics. First we prove that the information available allows us to inspect the personnel policies of the firm. Furthermore, this fact allows moving from the case study to more comprehensive studies in personnel economics...

We show results for the contact process on Barabasi networks. The contact process is a model for an epidemic spreading without permanent immunity that has an absorbing state. For finite lattices, the absorbing state is the true stationary state, which leads to the need for simulation of...

We study how people react to small probability events with large negative consequences using the outbreak of the COVID-19 epidemic as a natural experiment. Our analysis is based on a unique administrative data set with anonymized monthly expenditures at the individual level. We find that older...

The relationship between the worker's career path and wage growth is studied using a longitudinal sample of large firms. The econometric analysis shows that promoted workers receive a positive wage premium even if they stay in the same job level. Demotions are associated with negative wage...