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Publications

Publications by Maria Clara Vaz

2018

Determinants of nursing homes performance: The case of Portuguese Santas Casas da Misericórdia

Authors
Veloso, AS; Vaz, CB; Alves, J;

Publication
Springer Proceedings in Mathematics and Statistics

Abstract
This study aims to evaluate the economic efficiency of Nursing Homes owned by 96 Santas Casas da Misericórdia (SCM) and the determinants that influenced their efficiency in 2012 and 2013. The SCM are the oldest non-profit entities, which belong to Third Sector in Portugal, provide this social response and receive significant financial contributions annually from the state. The study is developed in two stages. In the first stage, the efficiency scores were calculated through the non-parametric DEA technique. In the second stage, Tobit regression is used to verify the effect of certain organizational variables on efficiency, namely the number of users and existence of Nursing Home chains. The results of the DEA model show that the efficiency average is 81.9%, and only 10 out of 96 Nursing Homes are efficient. Tobit regression shows that the number of users has a positive effect on the efficiency of Nursing Homes, whereas the existence of Nursing Home chains affects their efficiency negatively. © Springer International Publishing AG 2018.

2018

Efficiency and capital structure in Portuguese SMEs

Authors
Fernandes, A; Vaz, CB; Monte, AP;

Publication
Springer Proceedings in Mathematics and Statistics

Abstract
This paper aims to analyse the bi-directional relationship between technical efficiency, as a measure of companies’ performance, and capital structure, under the agency cost theory as well as the pecking order and trade-off theory, to explain the capital structure decisions. The technical efficiency was estimated by the DEA method and corrected by using a suitable bootstrap to obtain statistical inferences. To test the agency cost hypothesis, asymmetric information hypothesis, risk-efficiency hypothesis and franchise value hypothesis (under pecking order and trade off theories framework), two models were applied using some determinants of capital structure such as size, profitability, tangibility, liquidity as control and explanatory variables through a truncated regression with bootstrapping. From an initial sample of 1024 small and medium sized companies from the interior of Portugal, for the period 2006–2009, a subsample of 210 SMEs from secondary and tertiary sectors was selected. The results suggest that medium sized companies have higher average bias-corrected efficiency than small companies; that short-term leverage is positively related to efficiency and that the companies in the sample follow pecking order theory. © Springer International Publishing AG 2018.

2011

Evolução do desempenho de lojas de retalho ao longo do tempo utilizando o índice de Malmquist

Authors
Maria Clara Vaz; Ana Camanho

Publication
IO 2011 - 15º Congresso da Associação Portuguesa de Investigação Operacional, pp.65-77, Coimbra, Portugal

Abstract
Este artigo avalia a evolução do desempenho de lojas de base alimentar de um retalhista Europeu. A técnica de Data Envelopment Analysis e o índice de Malmquist são combinados com a técnica de bootstrap para medir as alterações de produtividade entre os anos de 2002 e 2004, e identificar as alterações consideradas estatisticamente significativas. Na avaliação de desempenho ao longo do tempo há que ter em conta dois efeitos: a variação de eficiência técnica de cada loja e a alteração da fronteira da tecnologia. O índice de Malmquist permite captar correctamente estes dois efeitos. A variação da eficiência técnica mede a evolução da capacidade de cada loja em aproximar-se dos melhores níveis observados nas unidades de referência. A alteração da fronteira da tecnologia traduz a evolução verificada nas práticas das melhores lojas, que indicam os melhores níveis de produtividade alcançáveis no período em análise, e o rumo o seguir numa perspectiva de melhoria contínua.

2012

Metodologia de apoio à gestão logística em unidades de saúde

Authors
Maria Clara Vaz

Publication
Encontros de Tróia - III Encontro de Tróia - Qualidade, Investigação e Desenvolvimento, Tróia, Portugal

Abstract

2012

Metodologia de apoio à gestão logística em unidades de saúde.

Authors
Maria Clara Vaz

Publication
Ias Jornadas de Farmácia - Ias Jornadas de Farmácia, Bragança, Portugal

Abstract

2012

Performance comparison of retailing stores using a Malmquist-type index

Authors
Maria Clara Vaz; Ana Camanho

Publication
JORS - Journal of the Operational Research Society, vol.63, pp.631-645

Abstract

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