By order of Professor Doctor José Manuel Janeira Varejão, Director of the Faculty of Economics of the University of Porto (FEP), of 20th June 2022, it was decided to open an international selection procedure for hiring a doctoral researcher (Junior Researcher), for the exercise of scientific research activities in the FOS scientific area (s) of 5. Social Sciences-5.2 Economics and Management, under the Labor Code, within the scope of the R&D Unit Center for Economics and Finance of Porto, under the reference DSAIPA/CS/0086/2020, for the project “impact of Covid-19 lockdown measure on mobility, air pollution and macroeconomic indicators in Portugal: a machine learning approach” ongoing at FEP and financed by funds the Foundation for Science and Technology.