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# Table 4 Node-level statistics of node *i* given inter-city network \(\mathcal {N}_{x}\)

Network statistic | Notation | Description |
---|---|---|

Weighted in-degree | \(WI(\mathcal {N}_{x})_{i}\) | Total weighted in-degree of i on \(\mathcal {N}_{x}\) |

Weighted out-degree | \(WO(\mathcal {N}_{x})_{i}\) | Total weighted out-degree of i on \(\mathcal {N}_{x}\) |

Weighted total degree | \(W(\mathcal {N}_{x})_{i}\) | Total weighted degree of i on \(\mathcal {N}_{x}\) |

Weighted clustering coefficient | \(CC(\mathcal {N}_{x})_{i}\) | Weighted clustering coefficient of i on \(\mathcal {N}_{x}\) |

Direct distance from San Juan | \(DSJ(\mathcal {N}_{x})_{i}\) | Direct distance to i from San Juan on \(\mathcal {N}_{x}\) |

Shortest path distance from San Juan | \(SPSJ(\mathcal {N}_{x})_{i}\) | Distance of shortest path to i from San Juan on \(\mathcal {N}_{x}\) |