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Economic uncertainty of pandemic and international airlines behaviour

Fig 2

Causality-in-mean result for the airlines.

Note: The figure plots the estimates of the nonparametric causality tests of the various quantiles. The y-axis report test statistics and quantiles of the airline stock returns are on x-axis. Full and COVID represents the full sample and COVID-19 pandemic sample, respectively.

Fig 2

doi: https://doi.org/10.1371/journal.pone.0266842.g002