This article extends the parametric portfolio policy approach to optimizing portfolios with a large numbers of assets (Brandt, et al. 2009). The proposed approach incorporates unobserved effects into the portfolio policy function. These effects measure the importance of unobserved heterogeneity...

This paper analyses Delta CoVaR proposed by Adrian and Brunnermeier (2008) as a tool for identifying/ranking systemically important institutions and assessing interconnectedness. We develop a test of significance of Delta CoVaR that allows determining whether or not a financial institution can...

We propose a method for event studies based on synthetic portfolios that provides a robust data-driven approach to build a credible counterfactual. The method is used to evaluate the effectiveness of volatility auctions using intraday data from the Colombian Stock Exchange. The results indicate...

We provide a common framework that relates traditional event study estimation methods in finance with a modern approach for causal event studies. This framework is called synthetic portfolio and is a particular case of synthetic control methods. We provide a simulation exercise and an empirical...

Spanish Abstract: En 2014 el Ministerio de Educación Nacional de Colombia lanzó el programa Ser Pilo Paga como parte del objetivo de convertir el país en el más educado de América Latina en el 2025. Desde su creación, el programa ha beneficiado a más de 30,000 jóvenes de escasos recursos...

Following (Almeida, Ardison, Kubudi, Simonsen, & Vicente, 2018) we implement a segmented three factor Nelson-Siegel model for the yield curve using daily observable bond prices and short term interbank rates for Colombia. The flexible estimation for each segment (short, medium, and long)...

pt. 1. Migrant labour and 'quality' food products -- pt. 2. Social (un)sustainability of intensive agriculture : migrant labour in supply chains 'under pressure' in Southern Europe -- pt. 3. Restructuring of agri-food systems in Maghreb and Middle-East -- pt. 4. Restructuring of agricultural...

This paper extends the parametric portfolio policy approach to optimizing portfolios with large numbers of assets, derived by Brandt et al. (2007). The proposed approach incorporates unobserved effects into the portfolio policy function. These effects measure the importance of unobserved...

This paper analyses Delta CoVaR proposed by Adrian and Brunnermeier (2008) as a tool for identifying/ranking systemically important institutions and assessing interconnectedness. We develop a test of significance of Delta CoVaR that allows determining whether or not a financial institution can...