This paper provides a game-theoretic model of network formation with a continuous effort choice. Efforts are strategic complements for direct neighbors in the network and display global substitution/congestion effects. We show that if the parameter governing local strategic complements is larger...

This paper studies optimal targeting policies, consisting of eliminating (preserving) a set of agents in a network and aimed at minimizing (maximizing) aggregate effort levels. Different from the existing literature, we allow the equilibrium network to adapt after a network intervention and...

The measurement of treatment (intervention) effects on a single (or just a few) treated unit(s) based on counterfactuals constructed from artificial controls has become a popular practice in applied statistics and economics since the proposal of the synthetic control method. In high-dimensional...

In this paper we survey the most recent advances in supervised machine learning and highdimensional models for time series forecasting. We consider both linear and nonlinear alternatives. Among the linear methods we pay special attention to penalized regressions and ensemble of models. The...

There has been considerable advance in understanding the properties of sparse regularization procedures in high-dimensional models. In time series context, it is mostly restricted to Gaussian autoregressions or mixing sequences. We study oracle properties of LASSO estimation of weakly sparse...

This paper seeks to estimate the distributive impact of the taxes and other fiscal contributions that finance social security in Brazil. Making a certain number of strong hypotheses relative to the fiscal incidence of social security financing, we compute a measure of incidence that aggregates...

Surveys of cases and case studies enrich the fund of knowledge that may serve as a base for proposals of public policy. The present text gives two reasons and constructs a defense of case studies. First, natural sciences - or, perhaps should one say, mixed sciences - also investigate cases, so...

This paper tries to do an international and technological comparison of the Brazilian manufacturing in 2011. The main conclusion is the following: the Brazilian manufacturing has technological supply chains similar to the more developed countries, although it needs development in a few sectors.

There is a need to place in balance the institutional barriers to whitecollar wrongdoings within organizations. To do this an organization may embrace aims more encompassing than the usual ones as well as methods of acknowledging and reinforcing the worth of people. Here one expounds a general...