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A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over long periods of time (i.e., uses longitudinal data). It is often a type of observational study, although it can also be structured as longitudinal randomized experiment. [1]
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NCES has continued the National Education Longitudinal Studies program with five additional longitudinal cohort studies, as of 2022. [19] These studies are separated by roughly ten years each and were designed to also be nationally representative and comparable to the data measured and collected in NLS-72. [20]
A cohort study is a particular form of longitudinal study that samples a cohort (a group of people who share a defining characteristic, typically those who experienced a common event in a selected period, such as birth or graduation), performing a cross-section at intervals through time.
The Academy of Sciences of Albania (Albanian: Akademia e Shkencave e Shqipërisë), founded in 1972, is the most important scientific institution in Albania. [1] In the 1980s, several research institutes began at the University of Tirana were transferred to the Academy's jurisdiction. [2]
The statistical service was eventually institutionalized by Decree no. 121, dt. 8/04/1940. The statistical system that followed, was established by Decision no. 35, dt. 13.01.1945 with the creation of the Directorate of Statistics, a subordinate institution of the Council of Ministers .
The Albanian Wikipedia (Albanian: Wikipedia Shqip) is the Albanian language edition of Wikipedia started on 12 October 2003. As of 17 February 2025, the Wikipedia has 101,694 articles and is the 73rd-largest Wikipedia. [1]
Zef Mirdita (March 13, 1936 – April 4, 2016) was a Kosovan historian, university professor and academic. [1] He has made a significant contribution to the fields of Illyrology and Balkan studies. [2] [3] [4]