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Table 2 Results of diagnostic tests for heteroscedasticity and autocorrelation

From: Is industrial pollution detrimental to public health? Evidence from the world’s most industrialised countries

  Test statistic
Test CO2 emissions
equation (5.1)
Nitrous oxide emissions eq. (5.1)
Modified Wald test for groupwise heteroskedasticity 425.29**** 3355.33***
Wooldridge test for autocorrelation in panel data 5.538** 4.705**
  1. Heteroscedasticity: Modified Wald test for groupwise heteroskedasticity; Ho: sigma(i)^ 2 = sigma^ 2 for all i: No heteroskedasticity. Auto correlation: Wooldridge test for autocorrelation in panel data. H0: no first-order autocorrelation. Note: *** and ** denote significance level at 1 and 5%, respectively