Corruption, growth and ethnic fractionalization: a theoretical model

This paper analyzes the existing relationship between ethnic fractionalization, corruption and the growth rate of a country. We provide a simple theoretical model. We show that a nonlinear relationship between fractionalization and corruption exists: corruption is high in homogeneous or very fragmented countries, but low where fractionalization is intermediate. In fact, when ethnic diversity is intermediate, constituencies act as a check and balance device to limit ethnically-based corruption. Consequently, the relationship between fractionalization and growth rate is also non-linear: growth is high in the middle range of ethnic diversity, low in homogeneous or very fragmented countries.     

Sequential auctions with imperfect quantity commitment

This paper studies sequential second price auctions with imperfect quantity commitment in environments involving single-unit demands, independent private values, and non-decreasing marginal costs. The paper characterizes the symmetric equilibrium strategy and demonstrates that the equilibrium price sequence is conditionally non-increasing, showing a downwards drift in cases in which the marginal cost exceeds the reserve price with positive probability. The paper also argues that unlike a strong seller who sets reserve prices strictly above marginal costs, a weak seller will typically prefer to commit to such inefficiently low reserve prices.     

Growth,Distribution, and External Constraints: A Post-Kaleckian Model Applied to Brazil

ABSTRACT

The purpose of this research is to analyze whether the Brazilian economy behaved under a wage-led or profit-led regime between 1960 and 2011, considering a Post-Kaleckian model in a context of external constraints. The time span is limited by data availability (i.e., 2011). To answer the question of whether the Brazilian economy works under a wage-led or profit-led regime, we propose a simple Post-Kaleckian model. The model suggests that a profit-led regime is more probable for Brazil. Moreover, a wage-led regime occurs when a balance of payments constrained growth model is taken into consideration. Likewise, the real exchange rate has a positive impact on economic growth through the export channel. This result is a novelty in the recent literature about the relationship between real exchange rate and economic growth within a Post-Kaleckian model. The Brazilian economy was chosen as it is one of the biggest economies in Latin America.     

Liquidity and market incompleteness

This note shows that according to Lippman and McCall’s (Am Econ Rev 76, 43–55, 1986) operational definition of liquidity, incomplete markets are a necessary condition for illiquidity. This note is a revised subset of a larger paper that circulated under the name of “Liquidity as an Insurance Problem” (Zurita 2001). I am grateful to Luis Ahumada, David K. Levine, Raimundo Soto, Gert Wagner, Federico Weinschelbaum and seminar participants at UCLA, Summer Meeting of the Econometric Society, Banco Central de Chile, LACEA, Jornadas de Economía del Banco Central del Uruguay, and ILADES, for their helpful comments, as well as the feedback of an anonymous referee. Financial support from Vicerrectoría Académica de la Pontificia Universidad Católica de Chile is gratefully acknowledged.     

Minimum cost spanning tree problems with groups

We study minimum cost spanning tree problems with groups. We assume that agents are located in different villages, cities, etc. The groups are the agents of the same village. We introduce a rule for dividing the cost of connecting all agents to the source among the agents taking into account the group structure. We characterize this rule with several desirable properties. We prove that this rule coincides with the Owen value of the TU game associated with the irreducible matrix.     

Feedback effects of credit ratings

Rating agencies are often criticized for being biased in favor of borrowers, for being too slow to downgrade following credit quality deterioration, and for being oligopolists. Based on a model that takes into account the feedback effects of credit ratings, I show that: (i) rating agencies should focus not only on the accuracy of their ratings but also on the effects of their ratings on the probability of survival of the borrower; (ii) even when rating agencies pursue an accurate rating policy, multi-notch downgrades or immediate default may occur in response to small shocks to fundamentals; (iii) increased competition between rating agencies can lead to rating downgrades, increasing default frequency and reducing welfare.     

Independent boards and innovation

Much research has suggested that independent boards of directors are more effective in reducing agency costs and improving firm governance. How they influence innovation is less clear. Relying on regulatory changes, we show that firms that transition to independent boards focus on more crowded and familiar areas of technology. They patent and claim more and receive more total future citations to their patents. However, the citation increase comes mainly from incremental patents in the middle of the citation distribution; the numbers of uncited and highly cited patents—arguably associated with riskier innovation strategies—do not change significantly.     

Intraregional Spillovers in South America: Is Brazil Systemic After All?

The high business cycle correlation between Brazil (the large neighbour in South America) and other countries in the region has been a frequent source of concern for policymakers, as it has been viewed as evidence of the large influence of the former country on its neighbours. This paper studies the importance of such influence, documenting trade linkages over the last two decades and quantifying spillover effects in a vector autoregression setting. We find that, after controlling for common external factors, spillovers from Brazil are only relevant for Southern Cone economies (especially Mercosur's members) and Peru, but not for the rest of South America, and these findings are consistent with the extent of trade linkages between these countries. We find also that spillovers can take two different forms: the transmission of Brazil‐specific shocks and the amplification of global shocks – through their impact on Brazil's output. Finally, we also find suggestive evidence that depreciations of Brazil's currency may not have significant impact on output of its key trading partners.