A decomposição do índice de Hirschman-Herfindahl

Some Notes on Applying the Herfindahl-hirschman Index

The Herfindahl-Hirschman Index is one of the most commonly used indicators to detect anticompetitive behavior in industries. In fact, an increase in the value of the index is usually interpreted as an indicator of actions which may lessen competition or even create a monopoly. In this paper we show that this is not always the case. If all firms cooperate, then the index cannot be used since it ...

When Bigger Is Better: A Critique of the Herfindahl-Hirschman Index’s Use to Evaluate Mergers in Network Industries

Un enfoque gramatical para la extracción de términos índice

The extraction of the keywords that characterize a document in a given collection is one of the most important components of an Information Retrieval system. In this article, we propose to apply shallow parsing, implemented by means of cascades of finite-state transducers, to extract complex index terms based on an approximated grammar of Spanish. The coverage of the grammar is small but it all...

Uso del punto de transición en la selección de términos índice para agrupamiento de textos cortos

Nowadays a wide variety of clustering methods exist. The critical decision of what keywords will be used in the representation of the collection is considered in those methods. In this paper we deal with the problem of clustering a set of short texts from an specific domain. Thus, the problem become to be more complex because of the small number of terms that can be used in term selection proce...

Uso da Análise Fatorial para geração de Índice de Maturidade em Governança de TI no Governo do Estado de São Paulo

High investments needed by Information Technology (IT) require accuracy and alignment with organizational strategies as well as responsibility from all areas of the organization. This scenario brought importance to Information Technology Governance (ITG) in public and private organizations management in recent years. This research used secondary data from Sao Paulo State Departments and used fa...