May 16, 2020
We analyzed data from the COVID-19 outbreak in Chile using the segmental regression methodology for Poisson data with exponential growth as proposed by Muggeo, Sottile and Porcu [doi: 10.13140/RG.2.2.32798.28485]. We have updated the report made on April 15 with the latest information provided by the Ministry of Science, Technology, Knowledge and Innovation. Our main finding is that the number of days requested to double the number of cases of COVID-19 has been reduced for the regions: Metropolitana, Coquimbo, Valparaíso, O'Higgins and Biobío, as well as at the national level. The report is available here: http://matematica.usm.cl/covid-19-en-chile
For the R codes visit the GitHub page .
May 10, 2020
During the 80s, the Chilean pension system underwent a reform that transformed it into an individual capitalization system. The pension system structure is based on freedom and individual responsibility, as well as free competition of pension fund management companies (in Spanish: Administradoras de Fondos de Pensiones, or AFP). In 2002, a new savings method was introduced. Now, each worker can choose among five investment funds that are differentiated from one another by the proportion of resources that are invested in variable income securities. Basically, AFPs have concentrated these types of variable income securities in shares, mutual funds, tradable certificates issued by foreign banks, and other financial instruments. Currently, the improvement and inspection of Chile's pension system is a controversial issue. For datasets and further reading, see my GitHub webpage
September 7, 2015
Following the International Seismic Conference, which brought together more than 50 scientists from the fields of mathematics, statistics and the sciences concerned with natural disasters, the spatial-temporal statistics research group, made up of academics from the Department of Mathematics of the Universidad Técnica Federico Santa María, Emilio Porcu and Ronny Vallejos, has achieved significant results.
Read the complete news here
May 4, 2013
Letter to the Director written in collaboration with Ronny Vallejos, Ph.D. about the situation of the Chilean National Institute of Statistics (INE) .