Czech Republic 3 Developed Countries 3 Eastern Europe 3 English Abstract 3 Europe 3 Journal Article 3 Demographic Factors 2 Economic Factors 2 Population 2 Population Characteristics 2 Research Methodology 2 Socioeconomic Factors 2 Adult 1 Age Factors 1 Aged 1 Demographic Aging 1 Educational Status 1 Employment Status 1 Estimation Technics 1 Evaluation 1 Microeconomic Factors 1 Old Age Security 1 Population Dynamics 1 Population Forecast 1 Population Projection 1 Poverty 1 Research Report 1 Retirement--changes 1 Sampling Studies 1 Sex Factors 1