In this issue of the journal Econometrics Ekonometria. Advances in Applied Data Analysis, eight articles are published. The paper by Marek Walesiak and Grażyna Dehnel concerns the variation in population ageing in Polish provinces in 2002, 2010 and 2017, and applies a new method of automatic data collection from the Local Data Bank using the BDL package and the API interface (Application Programming Interface). Mirosława Sztemberg-Lewandowska presents the results of the empirical study of the achievements of students at II-IV stages of education using functional principal components analysis. The modelling of economic and safety effects of international migrations is the subject of the article by Kateryna Berezka and Olha Kovalchuk. The empirical research confirmed the causal link between the volumes of international migration flows and the growth of Foreign Direct Investment in their home countries and the reduction of security in host countries. The authors of the next article, Dorota Kwiatkowska-Ciotucha, Urszula Załuska, Magdalena Ślazyk-Sobol, Minna Lehesvuori and Angelika Polak, carried out an analysis of occupational burnout in health care. They analysed the systemic and organisational risks as well as possible preventive actions. Adam Sagan discussed the methodological aspects of sample size determination in multilevel structural equation modelling (SEM) in the analysis of satisfaction with the banking products in Poland. Jan Kaczmarzyk indicated in his article that considering several reasonable sets of assumptions for the Monte Carlo simulation simultaneously can bring even more comprehensive information about enterprise risk. Luiza Ochnio, Tomasz Rokicki, Grzegorz Koszela, Bogdan Klepacki compared European Union countries in terms of the dynamics of changes in the value of lamb meat imports in the period 2003-2017. The aim of the research conducted by Elżbieta Roszko-Wójtowicz, Maria M. Grzelak and Iwona Laskowska, was to measure and assess the impact of expenditure on research and development (R&D) activities on the competitiveness of manufacturing divisions in Poland.