Table 3 Roman roads and economic outcomes: correlations

From: When History Leaves a Mark: A New Measure of Roman Roads

  Roman roads
  All Major Certain
NUTS 3 level
   Value added 0.555* 0.424* 0.577*
   Total exports 0.084 0.072 0.138
   Nighttime luminosity 0.023 \(-\)0.029 0.080
   Total population 0.612* 0.538* 0.636*
Grid cell level
   Nighttime luminosity 0.225* 0.247* 0.299*
NUTS 3 level, density
   Total population 0.263* 0.334* 0.271*
  1. Asterisks denote 5% significance level
  2. Source: Author’s elaboration from own data, from Istat (2011) data and from Version 4 DMSP-OLS Nighttime Lights Time Series data