A Influência da Concentração de Poder na Melhoria da Qualidade: O Caso Royal

This work intends to analyze the influence of the power in the process of quality improvement in managerial organizations, being taken based on a case study regarding to a company of medium load placed in the southeast area of Brazil which in the intention of solving difficulties in inserting its products in the market, it opted to implement quality programs. The data were collected through observations and bibliographical researches about the company, where the author participated as employee for a close period of 6 years. The results indicate that the imported methodologies of administration ¿ as it is the case of the quality models ¿ cannot produce the expected results, when these methodologies are implemented by ignoring cultural factors, mainly related to form as the power is shared and practiced in the organizations.

Comparing value-at-risk methodologies

In this paper, we compare four different Value-at-Risk (V aR) methodologies through Monte Carlo experiments. Our results indicate that the method based on quantile regression with ARCH effect dominates other methods that require distributional assumption. In particular, we show that the non-robust methodologies have higher probability to predict V aRs with too many violations. We illustrate our findings with an empirical exercise in which we estimate V aR for returns of S˜ao Paulo stock exchange index, IBOVESPA, during periods of market turmoil. Our results indicate that the robust method based on quantile regression presents the least number of violations.