Diffeomorphism Cohomology in Beltrami Parametrization II : The 1-Forms

We study the 1-form diffeomorphism cohomologies within a local conformal Lagrangian Field Theory model built on a two dimensional Riemann surface with no boundary. We consider the case of scalar matter fields and the complex structure is parametrized by Beltrami differential. The analysis is first performed at the Classical level, and then we improve the quantum extension, introducing the current in the Lagrangian dynamics, coupled to external source fields. We show that the anomalies which spoil the current conservations take origin from the holomorphy region of the external fields, and only the differential spin 1 and 2 currents (as well their c.c) could be anomalous.Comment: 39 pages,CPT-94/P.3072,LaTe

Leviathan as a Minority Shareholder: A Study of Equity Purchases by the Brazilian National Development Bank (BNDES), 1995-2003

There is a growing literature comparing the performance of private vs. state-owned companies. Yet, there is little work examining the effects of having the government as a minority shareholder of private companies. We conduct such a study using data for 296 publicly-traded corporations in Brazil, looking at the effects of equity purchases by the National Bank for Economic and Social Development (BNDES) on firm performance between 1995 and 2003. Our fixed-effects regressions show that BNDES's purchases of equity lead to increases in return on assets and investment in fixed assets. Finally, we find that the positive effect of BNDES' equity purchases is reduced when the target firms belong to state-owned and private pyramidal groups. Therefore, our argue that having development banks owning minority stakes can have a positive effect on performance as long as they promote long-term investments and are shielded from governmental interference and potential minority shareholder expropriation.

The measurement of social impact and opportunities for research in business administration

In the last decades, management scholars have examined ways through which firms can build profitable operations while at the same time addressing pressing social and environmental concerns. But how can organizations ascertain whether their isolated or collaborative efforts are truly generating positive impact to their target populations? Measuring real impact requires addressing several issues related to causality, comparability, and cost (given that most methods require customized data collection and analysis). In this article, I briefly discuss alternative methods to assess impact and then suggest novel research avenues to inform the debate on how to measure impact and how impact measurement practices can help organizations blend social and economic goals

The measurement of social impact and opportunities for research in business administration

In the last decades, management scholars have examined ways through which firms can build profitable operations while at the same time addressing pressing social and environmental concerns. But how can organizations ascertain whether their isolated or collaborative efforts are truly generating positive impact to their target populations? Measuring real impact requires addressing several issues related to causality, comparability, and cost (given that most methods require customized data collection and analysis). In this article, I briefly discuss alternative methods to assess impact and then suggest novel research avenues to inform the debate on how to measure impact and how impact measurement practices can help organizations blend social and economic goals

The role of complex structures in w-symmetry

In a symplectic framework, the infinitesimal action of symplectomorphisms together with suitable reparametrizations of the two dimensional complex base space generate some type of W-algebras. It turns out that complex structures parametrized by Beltrami differentials play an important role in this context. The construction parallels very closely two dimensional Lagrangian conformal models where Beltrami differentials are fundamental.Comment: LaTex, 34 pages, no figures, to be published in Nucl. Phys.