Abstract This paper delivers an up-to-date literature review dealing with aggregation over time of economic time series, e.g. the transformation of high-frequency data to low frequency data, with a focus on its benefits (the beauty) and its costs (the ugliness). While there are some benefits...

This paper looks into methodological issues of sample design for a specific target population Romanian youths (aged 16-35) that reside in rural areas. The first part of the paper will provide an overview into general issues that come from demographic trends, such as the overall population...