Research

My research line is Choice Modeling applied to transportation demand, travel behavior, time-use and activities, and sustainable mobility. My main affiliation is Universidad de Concepción, but I am also part of the Complex Engineering Systems Institute and the Centre for Sustainable Urban Development. The research conferences I usually try to attend are the Annual Meeting of the Transportation Research Board, the International Choice Modelling Conference, the International Conference for Travel Behaviour Research, and the Congreso Chileno de Ingeniería de Transporte.

You can see the details of my research on my Google Scholar and Web of Science profiles, using the name Sebastian Astroza. When I was a master student I decided to drop the accent mark of my first name (Sebastián) and my second last name (Tagle) for my “author name”, thinking that would be easier for everyone. I am unsure if I would do that now, but I guess it is too late. What is life anyway? A series of regretful decisions, one after another.

Publications (Web of Science) #

• Miranda, R., Carrasco, J.A., and Astroza, S. (2025) Food purchasing and eating patterns: Assessing the role of people’s mobility, social networks, and attitudes on healthy diets. Travel Behaviour and Society. https://doi.org/10.1016/j.tbs.2024.100889
• Astroza, S., Hurtubia, R., Tirachini, A., Guevara, A., Carrasco, J.A., Salas, P., and Munizaga, M. (2024) Analysing the Determinants of Teleworking During the COVID-19 Pandemic in Chile. Transportation Research Record. Forthcoming.
• Cheng, Y.T., Lavieri, P., Santos de Sá, A.L., and Astroza, S. (2024) Investigating the effects of ICT evolution and the COVID-19 pandemic on the spatio-temporal fragmentation of work activities. Transportation Research Part A. https://doi.org/10.1016/j.tra.2024.104192
• Henríquez, S., Carrasco, J.A., and Astroza, S. (2024) Toward mainstreaming care activities in transportation: a time use and mobility segmentation approach. Transportation Letters. https://doi.org/10.1080/19427867.2024.2393536
• Jara-Díaz, S.R., Morales, M., and Astroza, S. (2023) Transcending the gender distribution of work: committed time, activity substitution, and leisure. Transportation. https://doi.org/10.1007/s11116-023-10438-5
• Astroza, S., Guarda, P., and Carrasco J.A. (2022) Modeling the relationship between food purchasing, transport, and health outcomes: Evidence from Concepcion, Chile. Journal of Choice Modelling, 42, 100341 https://doi.org/10.1016/j.jocm.2021.100341
• Espejo, F, Astroza, S. and Hurtubia, R. (2022) On the relation between school and residential location choice: Evidence of heterogeneous strategies from Santiago de Chile. Journal of Transport Geography, 102, 103359. https://doi.org/10.1016/j.jtrangeo.2022.103359
• Salas, P, De la Fuente, R., Astroza, S., and Carrasco J.A. (2022) A systematic comparative evaluation of machine learning classifiers and discrete choice models for travel mode choice in the presence of response heterogeneity. Expert Systems with Applications, 193, 116253. https://www.sciencedirect.com/science/article/abs/pii/S0957417421015633
• Astroza, S., Garikapayi, V., Pendyala, R.M., Bhat, C.R. and Mokhtarian, P. (2019) Representing heterogeneity in structural relationships among multiple choice variables using a latent segmentation approach. Transportation, 46, 1755–1784, https://link.springer.com/article/10.1007/s11116-018-9882-7
• Leung, K.Y.K., S. Astroza, B.P.Y. Loo, and C.R. Bhat. (2019) An environment-people interactions framework for analysing children’s extra-curricular activities and active transport. Journal of Transport Geography, 74, 341-358. https://www.sciencedirect.com/science/article/pii/S0966692318304587?via%3Dihub
• Astroza, S., P.C. Bhat, C.R. Bhat, R.M. Pendyala, and V.M. Garikapati. (2018) Understanding activity engagement across weekdays and weekend days: a multivariate multiple discrete-continuous modeling approach. Journal of Choice Modelling, 28, 56-70. https://www.sciencedirect.com/science/article/pii/S1755534517301525
• Nair, G.S., S. Astroza, C.R. Bhat, S. Khoeini and R.M. Pendyala. (2018) An application of a rank ordered probit modeling approach to understanding level of interest in autonomous vehicles. Transportation, 45, 1623-1637 https://link.springer.com/article/10.1007%2Fs11116-018-9945-9
• Singh, A.C., S. Astroza, V.M. Garikapati, R.M. Pendyala, C.R. Bhat, and P.L. Mokhtarian. (2018) Quantifying the contribution of various factors to household vehicle miles of travel. Transportation Research Part D, 63, 23-36. https://www.sciencedirect.com/science/article/pii/S1361920917307551
• Vinayak, P., F.F. Dias, S. Astroza, C.R. Bhat, R.M. Pendyala, and V.M. Garikapati. (2018) Accounting for multi-dimensional dependencies among decision-makers within a generalized model framework: an application to understanding shared mobility service usage levels. Transport Policy, 72, 129-137. https://www.sciencedirect.com/science/article/pii/S0967070X17306224?via%3Dihub
• Astroza, S., V.M. Garikapati, C.R. Bhat, R.M. Pendyala, P. Lavieri, and F. Dias. (2017) Analysis of the impact of technology use on multi-modality and activity-travel characteristics. Transportation Research Record, 2666, 19-28. https://trrjournalonline.trb.org/doi/abs/10.3141/2666-03
• Astroza, S., P.N. Patil, K.I. Smith, and C.R. Bhat. (2017) Transportation planning to accommodate needs of wind energy projects. Transportation Research Record, 2669, 10-18. https://trrjournalonline.trb.org/doi/abs/10.3141/2669-02
• Bhat, C.R., S. Astroza, and P.S. Lavieri. (2017) A new spatial and flexible multivariate random-coefficients model for the analysis of pedestrian injury counts by severity level. Analytic Methods in Accident Research, 16, 1-22. https://www.sciencedirect.com/science/article/pii/S2213665717300064
• Astroza, S., A.R. Pinjari, C.R. Bhat, and S.R. Jara-Díaz. (2017) A microeconomic theory-based latent class multiple discrete-continuous choice model of time use and goods consumption. Transportation Research Record, 2664, 31-41. https://trrjournalonline.trb.org/doi/abs/10.3141/2664-04
• Dias, F.F., P. Lavieri, V.M. Garikapati, S. Astroza, R.M. Pendyala and C.R. Bhat. (2017) A behavioral choice model of the use of car-sharing and ride-sourcing services. Transportation, TRB 2017 Special Issue, 44(6), 1307-1323. https://link.springer.com/article/10.1007/s11116-017-9797-8
• Lavieri, P., V.M. Garikapati, C.R. Bhat, R.M. Pendyala, S. Astroza, and F. Dias. (2017) Modeling individual preferences for ownership and sharing for autonomous vehicle technologies. Transportation Research Record, 2665, 1-10. https://trrjournalonline.trb.org/doi/abs/10.3141/2665-01
• Bhat, C.R., S. Astroza, and A. Hamdi. (2017) A spatial generalized ordered-response model with skew normal kernel error terms with an application to bicycling frequency. Transportation Research Part B, 95, 126-148. https://www.sciencedirect.com/science/article/pii/S019126151630460X
• Bhat, C.R., S. Astroza, and A.C. Bhat. (2016) On allowing a general form for unobserved heterogeneity in the multiple discrete-continuous probit model: formulation and application to tourism travel. Transportation Research Part B, 86, 223-249. https://www.sciencedirect.com/science/article/pii/S0191261515300266
• Bhat, C.R., S. Astroza, A.C. Bhat, and K. Nagel. (2016) Incorporating a multiple discrete-continuous outcome in the generalized heterogeneous data model: application to residential self-selection effects analysis in an activity time-use behavior model. Transportation Research Part B, 91, 52-76. https://www.sciencedirect.com/science/article/pii/S0191261515300278
• Jara-Díaz, S.R., S. Astroza, C.R. Bhat, and M. Castro. (2016) Introducing relations between activities and goods consumption in microeconomic time use models. Transportation Research Part B, 93, 162-180. https://www.sciencedirect.com/science/article/pii/S0191261515301417
• Bhat, C.R., S. Astroza, R. Sidharthan, M. Jobair Bin Alam, and W.H. Khushefati. (2014) A joint count-continuous model of travel behavior with selection based on a multinomial probit residential density choice model. Transportation Research Part B, 68, 31-51. https://www.sciencedirect.com/science/article/pii/S0191261514000770
• Bhat, C.R., S. Astroza, R. Sidharthan, and P. Bhat. (2014) A multivariate hurdle count data model with an endogenous multiple discrete-continuous selection system. Transportation Research Part B, 63, 77-97. https://www.sciencedirect.com/science/article/pii/S0191261514000320
• Jara-Díaz, S.R. and S. Astroza. (2013) Revealed willingness to pay for leisure: link between structural and microeconomic models of time use. Transportation Research Record, 2382, 75-82. https://trrjournalonline.trb.org/doi/abs/10.3141/2382-09
• Konduri, K., S. Astroza, B. Sana, R.M. Pendyala and S.R. Jara-Díaz. (2011) Joint analysis of time use and consumer expenditure data: examination of two approaches to deriving values of time. Transportation Research Record, 2231, 53-60. https://trrjournalonline.trb.org/doi/abs/10.3141/2231-07

Other publications #

• R. Hurtubia, A. Tirachini, S. Astroza, A. Guevara, J.A. Carrasco, and M. Munizaga (2022). Factores socioeconómicos y perceptuales que influyeron en el teletrabajo durante la pandemia COVID-19 en Santiago, Chile. Estudios de Transporte, 23(2). https://estudiosdetransporte.org/sochitran/article/view/279
• Y.T. Cheng, Lavieri, P.S., and Astroza, S. (2022). How did the COVID-19 Pandemic Impact the Location and Duration of Work Activities? A Latent Class Time-Use Study. Findings. https://doi.org/10.32866/001c.35621
• S. Cancino, H. de la Fuente, R. Victoriano, S. Astroza, J. Covarrubias, M. Durán and J.A. Carrasco (2020) Análisis de movilidad durante la pandemia de COVID-19 en las regiones del Biobío y Ñuble utilizando datos de teléfonos móviles. Revista Ingeniería de Sistemas, Vol XXXIV, 79-9. https://www.dii.uchile.cl/~ris/RIS2020/p3_movilidad_covid19_biobio_nuble_telefonos_moviles.pdf
• S. Astroza, A. Tirachini, R. Hurtubia, J.A. Carrasco, A. Guevara, M. Munizaga, M. Figueroa and V. Torres (2020) Mobility Changes, Teleworking, and Remote Communication during the COVID-19 Pandemic in Chile. Transport Findings, July, https://doi.org/10.32866/001c.13489