Mátyás, LászlóBalázsi, László2022-03-292011http://hdl.handle.net/20.500.14018/10582The paper introduces for the most frequently used three-dimensional fixed effects panel data models the appropriate Within estimators. It analyzes the behaviour of these estimators in the case of no-self-flow data, unbalanced data and dynamic autoregressive models.engPanel dataUnbalanced panelDynamic panel data modelMultidimensional panel dataFixed effectsTrade modelsGravity modelsFDIWorking paper