3 ) for the rate of Covid-19 infections, an increase in the overall tendency of spatial dependence was observed in the second half of March, followed by a decreasing trend by the end of the study period.
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Spatial clustering behaviour of Covid-19 conditioned by the development level: Case study for the administrative units in Romania.
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Our data is characterized by a low spatial data aggregation level which leads to high heterogeneity that needs treatment, as emphasized by the highly significant heteroskedasticity tests Therefore, we estimate and present the results of the spatially weighted two-stage least squares (HET) estimations (GMM method for spatial lag and error model with heteroskedasticity — ( Anselin, 2011 ), Eq.