Helton Saulo Bezerra dos Santos

Adjunct Professor

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https://heltonsaulo.github.io

· PhD in Economics (2013) from the Federal Univesity of Rio Grande do Sul (UFRGS/Brazil), Master in Statistics (2010) from the Federal University of Pernambuco (UFPE/Brazil), and Bachelor of Science in Economics (2007) from the Catholic University of Brasilia (UCB/Brazil).

· Research Stage in Statistics at the McMaster University (2015,2020/Canada).

· Full-time Adjunct Professor at the Department of Statistics, University of Brasília/UnB (Brazil), and member of the Graduate Program in Statistics (UnB/Brazil), and member of the Graduate Program in Economics (UnB/Brazil).

· Primary research areas in econometrics, computational statistics, and applied economics. Researcher with productivity grant PQ-2 from Brazil's national council of technological and scientific development (CNPQ).

· My ORCID

· Lattes (CV in Portuguese)

Selected Papers (2018-2021)

1. Saulo, Helton; LEÃO, JEREMIAS; NOBRE, JUVÊNCIO; BALAKRISHNAN, NARAYANASWAMY. A class of asymmetric regression models for left-censored data. Brazilian Journal of Probability and Statistics, v.35, p.62-84, 2021 Fator de Impacto (JCR 2020): 0.988

2. LEÃO, JEREMIAS; BOURGUIGNON, MARCELO; Saulo, Helton; SANTOS-NETO, MANOEL; CALSAVARA, VINÍCIUS. The Negative Binomial Beta Prime Regression Model with Cure Rate: Application with a Melanoma Dataset. JOURNAL OF STATISTICAL THEORY AND PRACTICE, v.15, p.63-., 2021

3. FERNANDO, NASCIMENTO; JEREMIAS, LEAO; Saulo, Helton. Bayesian inference for the Birnbaum-Saunders autoregressive conditional duration model with application to high-frequency financial data. COMMUNICATIONS IN STATISTICS: CASE STUDIES, DATA ANALYSIS AND APPLICATIONS ONLINE, v.7, p.1-15, 2021

4. Saulo, Helton; LEÃO, JEREMIAS; LEIVA, VÍCTOR; VILA, ROBERTO; TOMAZELLA, VERA. A bivariate fatigue-life regression model and its application to fracture of metallic tools. Brazilian Journal of Probability and Statistics, v.35, p.119-137, 2021 Fator de Impacto (JCR 2020): 0.988

5. LEIVA, VÍCTOR; Saulo, Helton; SOUZA, RUBENS; AYKROYD, ROBERT G.; VILA, ROBERTO. A new BISARMA time series model for forecasting mortality using weather and particulate matter data. JOURNAL OF FORECASTING, v.40, p.346-364, 2021 Fator de Impacto (JCR 2020): 2.306

6. SÁNCHEZ, LUIS; LEIVA, VÍCTOR; GALEA, MANUEL; Saulo, Helton. Birnbaum Saunders quantile regression and its diagnostics with application to economic data. APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, v.37, p.53-73, 2021 Fator de Impacto (JCR 2020): 1.338

7. ASSIS, DANILO LOPES; CHAGAS, VIRGÍNIA OLIVEIRA; Saulo, Helton; SUEMOTO, CLAUDIA KIMIE; SANTANA, ALFREDO NICODEMOS CRUZ. The role of VES-13 to identify limited life expectancy in older adults in primary healthcare settings. Revista da Escola de Enfermagem da USP, v.55, p.e03743-., 2021 Fator de Impacto (JCR 2020): 1.086

8. CANCHO, VICENTE G.; BARRIGA, GLADYS; LEÃO, JEREMIAS; Saulo, Helton. Survival model induced by discrete frailty for modeling of lifetime data with long-term survivors and change-point. COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, v.50, p.1161-1172, 2021 Fator de Impacto (JCR 2020): 0.893

9. Saulo, Helton; DASILVA, ALAN; LEIVA, VÍCTOR; SÁNCHEZ, LUIS; FUENTE'MELLA, HANNS. Log-symmetric quantile regression models. STATISTICA NEERLANDICA, v.., p.1-40, 2021 Fator de Impacto (JCR 2020): 1.19

10. MARTÍNEZ, JOSÉ L.; LEIVA, VÍCTOR; Saulo, Helton; LIU, SHUANGZHE. Estimating the covariance matrix of the coefficient estimator in multivariate partial least squares regression with chemical applications. CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS, v.214, p.104328-., 2021 Fator de Impacto (JCR 2020): 3.491

11. Saulo, Helton; VILA, ROBERTO; PAIVA, LEONARDO; BALAKRISHNAN, N.; BOURGUIGNON, MARCELO. On a Family of Discrete Log-Symmetric Distributions. JOURNAL OF STATISTICAL THEORY AND PRACTICE, v.15, p.67-., 2021

12. CUNHA, DANÚBIA R.; VILA, ROBERTO; Saulo, Helton; FERNANDEZ, RODRIGO N.. A General Family of Autoregressive Conditional Duration Models Applied to High-Frequency Financial Data. Journal of Risk and Financial Management, v.13, p.45-., 2020

13. FERNANDEZ, R. N.; PIVATTO, D.; FREITAS, E.; CARRARO, A.; SAULO, H.. Estimando o tempo ótimo de um contrato de concessão: Um estudo de caso para as rodovias gaúchas. Revista do Serviço Público (Brasília), v.71, p.245-273, 2020

14. BERNARDES, G. M.; SAULO, H.; FERNANDEZ, RODRIGO N.; LIMA-COSTA, M. F.; ANDRADE, F. B.. Catastrophic health expenditure and multimorbidity among older adults in Brazil. REVISTA DE SAÚDE PÚBLICA (ONLINE), v.54, p.125-., 2020

15. VILA, ROBERTO; FERREIRA, LETÍCIA; Saulo, Helton; PRATAVIERA, FÁBIO; ORTEGA, EDWIN. A bimodal gamma distribution: properties, regression model and applications. STATISTICS, v.54, p.469-493, 2020 Fator de Impacto (JCR 2020): 1.051

16. Saulo, Helton; VILA, ROBERTO; VILCA, FILIDOR; MARTÍNEZ, JOSÉ L.. On Asymmetric Regression Models with Allowance for Temporal Dependence. JOURNAL OF STATISTICAL THEORY AND PRACTICE, v.14, p.40-., 2020

17. SÁNCHEZ, LUIS; LEIVA, VÍCTOR; GALEA, MANUEL; Saulo, Helton. Birnbaum-Saunders Quantile Regression Models with Application to Spatial Data. Mathematics, v.8, p.1000-., 2020 Fator de Impacto (JCR 2020): 2.258

18. VILA, ROBERTO; LEÃO, JEREMIAS; Saulo, Helton; SHAHZAD, MIRZA NAVEED; SANTOS-NETO, MANOEL. On a bimodal Birnbaum-Saunders distribution with applications to lifetime data. Brazilian Journal of Probability and Statistics, v.34, p.495-518, 2020 Fator de Impacto (JCR 2020): 0.988

19. DASILVA, ALAN; DIAS, RENATA; Leiva, Victor; MARCHANT, CAROLINA; Saulo, Helton. [Invited tutorial] Birnbaum-Saunders regression models: a comparative evaluation of three approaches. JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION, v.90, p.1-19, 2020 Fator de Impacto (JCR 2020): 1.424

20. LEIVA, VÍCTOR; SÁNCHEZ, LUIS; GALEA, MANUEL; Saulo, Helton. Global and local diagnostic analytics for a geostatistical model based on a new approach to quantile regression. STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT, v.34, p.1457-1471, 2020 Fator de Impacto (JCR 2020): 3.379

21. Saulo, Helton; LEÃO, JEREMIAS; VILA, ROBERTO; Leiva, Victor; TOMAZELLA, VERA. On mean-based bivariate Birnbaum-Saunders distributions: Properties, inference and application. COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, v.49, p.6032-6056, 2020 Fator de Impacto (JCR 2020): 0.893

22. DESOUSA, MÁRIO F.; Saulo, Helton; SANTOS-NETO, MANOEL; LEIVA, VÍCTOR. On a new mixture-based regression model: simulation and application to data with high censoring. JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION, v.90, p.2861-2877, 2020 Fator de Impacto (JCR 2020): 1.424

23. MACEDO, J. B.; BOING, A. C.; ANDRADE, J. M.; SAULO, HELTON; FERNANDEZ, R. N.; ANDRADE, F. B.. Gastos catastróficos em saúde: análise da associação com condições socioeconômicas em Minas Gerais. Ciencia & Saude Coletiva, v.., p.1-18, 2020 Fator de Impacto (JCR 2020): 1.336

24. Saulo, Helton; LEÃO, JEREMIAS; SANTOS-NETO, MANOEL. Discussion of -Birnbaum-Saunders distribution: A review of models, analysis, and applications- by N. Balakrishnan and Debasis Kundu. APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, v.35, p.118-121, 2019 Fator de Impacto (JCR 2020): 1.338

25. VENTURA, MARCELO; Saulo, Helton; Leiva, Victor; MONSUETO, SANDRO. Log-symmetric regression models: information criteria and application to movie business and industry data with economic implications. APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY, v.35, p.963-977, 2019 Fator de Impacto (JCR 2020): 1.338

26. VILA, ROBERTO; NAKANO, EDUARDO Y.; Saulo, Helton. Theoretical results on the discrete Weibull distribution of Nakagawa and Osaki. STATISTICS, v.53, p.339-363, 2019 Fator de Impacto (JCR 2020): 1.051

27. Saulo, Helton; BOURGUIGNON, MARCELO; ZHU, XIAOJUN; BALAKRISHNAN, N.. Some simple estimators for the two-parameter gamma distribution. COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION, v.48, p.2425-2437, 2019 Fator de Impacto (JCR 2020): 1.118

28. ZHU, XIAOJUN; BALAKRISHNAN, N.; Saulo, Helton. On the existence and uniqueness of the maximum likelihood estimates of parameters of Laplace Birnbaum-Saunders distribution based on Type-I, Type-II and hybrid censored samples. METRIKA, v.82, p.759-778, 2019 Fator de Impacto (JCR 2020): 1.057

29. Saulo, Helton; LEÃO, JEREMIAS; LEIVA, VÍCTOR; AYKROYD, ROBERT G.. Birnbaum-Saunders autoregressive conditional duration models applied to high-frequency financial data. STATISTICAL PAPERS, v.60, p.1605-1629, 2019 Fator de Impacto (JCR 2020): 2.234

30. CUNHA, D. R.; LAVORATTO, L. A.; SAULO, H.; MACIEL, D. T. G. N.. Rendimento e desigualdade nas regiões metropolitanas brasileiras. RBEE. REVISTA BRASILEIRA DE ECONOMIA DE EMPRESAS, v.19, p.39-57, 2019

31. OLIVEIRA, W. B.; OLIVEIRA, S. S. T.; RODRIGUES, V. J. S.; SAULO, HELTON; CARDOSO, K. V.. Spatial operations on uncertain positional data. Journal of Information and Data Management - JIDM, v.10, p.185-205, 2019

32. PIRES, G.; SAULO, HELTON. Monitoramento da qualidade do ar usando cartas de controle por atributos baseadas na distribuição Birnbaum-Saunders. REVISTA BRASILEIRA DE ESTATÍSTICA, v.77, p.7-32, 2019

33. BOURGUIGNON, M.; SAULO, HELTON. On a new approach to estimate the shape parameter of the inverse Gaussian distribution. South African Statistical Journal, v.52, p.15-27, 2018

34. DESOUSA, MÁRIO F.; Saulo, Helton; LEIVA, VÍCTOR; SCALCO, PAULO. On a tobit-Birnbaum-Saunders model with an application to medical data. JOURNAL OF APPLIED STATISTICS, v.45, p.932-955, 2018 Fator de Impacto (JCR 2020): 1.404

35. FERNANDEZ, RODRIGO NOBRE; Saulo, Helton; CARRARO, ANDRÉ; TOURRUCÔO, FABRICIO; HILLBRECHT, RONALD. Public-Private Partnership Contractual Design: A Computational Model of the Moral Hazard with Lotteries. Public Organization Review, v.18, p.39-51, 2018

36. LEÃO, JEREMIAS; LEIVA, VÍCTOR; Saulo, Helton; TOMAZELLA, VERA. Incorporation of frailties into a cure rate regression model and its diagnostics and application to melanoma data. STATISTICS IN MEDICINE, v.37, p.4421-4440, 2018 Fator de Impacto (JCR 2020): 2.373

37. LEÃO, JEREMIAS; LEIVA, VÍCTOR; Saulo, Helton; TOMAZELLA, VERA. A survival model with Birnbaum-Saunders frailty for uncensored and censored cancer data. Brazilian Journal of Probability and Statistics, v.32, p.707-729, 2018 Fator de Impacto (JCR 2020): 0.988

38. MARTÍNEZ, JOSÉ L.; LEIVA, VÍCTOR; Saulo, Helton; Ruggeri, Fabrizio; ARTEAGA, GEAN C.. A new estimator for the covariance of the PLS coefficients estimator with applications to chemical data. JOURNAL OF CHEMOMETRICS, v.32, p.e3069-., 2018 Fator de Impacto (JCR 2020): 2.467