Carlos P. Barros

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BACKGROUND Sustained virological response (SVR) after therapy with interferon plus ribavirin reduces liver-related complications and mortality in patients coinfected with human immunodeficiency virus (HIV) and hepatitis C virus (HCV). We assessed the effect of SVR on HIV progression and mortality not related to liver disease. METHODS An observational(More)
Keywords: Saudi banks DEA-data envelopment analysis Double bootstrap Truncated regression a b s t r a c t This study analyses the technical efficiency of Saudi banks using a two-stage DEA-data envelopment analysis approach. In the first stage, we use a bootstrapped DEA–VRS model to identify the efficiency scores, and in the second stage, we use a(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: Banking DEA Two-stage Brazil Intermediate measure Centralized a b s t r a c(More)
BACKGROUND We compared the prognostic value of liver biopsy (LB) and FIB-4 index in patients with human immunodeficiency virus (HIV)/hepatitis C virus (HCV) coinfection. METHODS We studied patients from the Grupo de Estudio del SIDA 3603 study cohort, in whom fibrosis was evaluated at baseline using both LB (Metavir score) and FIB-4 index. We assessed(More)
This article analyzes conflicts in Brazil involving landless peasants and the violence that frequently results from their invasion and occupation of privately owned rural land for the period 2000–08. Land ownership in Brazil is overwhelmingly and historically characterized by large, family-owned estates (Pichon 1997). The unequal and inequitable allocation(More)
This study examines the time series behaviour of oil production for OPEC member countries within a fractional integration modelling framework recognizing the potential for structural breaks and outliers. The analysis is undertaken using monthly data from January 1973 to October 2008 for 13 OPEC member countries. The results indicate there is mean reverting(More)
a r t i c l e i n f o This paper investigates the statistical properties of the production of energy in Brazil using long range dependence techniques in monthly data from January 2000 to February 2013. Two important features of the data are analyzed, in particular, its degree of persistence and seasonality. The results indicate first that seasonality is an(More)
This study analyses the technical efficiency of Arabian banks using a DEA-Data Envelopment Analysis frontier model. In the first stage, a bootstrapped variable returns to scale (VRS) DEA model is used to identify the efficient scores. In the second stage, a bootstrapped truncated regression is adopted to identify the covariates that explain technical(More)